Hello I was able to use build yesterday however now whenever I try to build I get the issue, I need help I did not change anything to the gradle. No errors.
Error:Cause: peer not authenticated

You might need to log back into your Minecraft account. Don't know for sure though. Can you send the whole log (with --debug flag).

      > Could not resolve net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT.
         > Unable to load Maven meta-data from http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml.
            > Could not GET 'http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml'.
               > peer not authenticated
                            
 --stacktrace 
* Exception is:             
org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project 'MODChat'.
        at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:79)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:57)
        at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:491)
        at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:89)
        at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:42)
        at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:35)
        at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:126)
        at org.gradle.internal.Factories$1.create(Factories.java:22)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52)
        at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:123)
        at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:33)
        at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:100)
        at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:94)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62)
        at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:94)
        at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94)
        at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
        at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43)
        at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28)
        at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:77)
        at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:47)
        at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51)
        at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28)
        at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43)
        at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:170)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237)
        at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206)
        at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
        at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
        at org.gradle.launcher.Main.doAction(Main.java:33)
        at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54)
        at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35)
        at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
        at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:30)
        at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:127)
        at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61)
Caused by: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':classpath'.
        at org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration.rethrowFailure(DefaultLenientConfiguration.java:62)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultResolvedConfiguration.rethrowFailure(DefaultResolvedConfiguration.java:36)
        at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyConfigurationResolver$FilesAggregatingResolvedConfiguration.rethrowFailure(SelfResolvingDependencyConfigurationResolver.java:112)
        at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver$ErrorHandlingResolvedConfiguration.rethrowFailure(ErrorHandlingConfigurationResolver.java:189)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:644)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getFiles(DefaultConfiguration.java:280)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getFiles(Unknown Source)
        at org.gradle.api.internal.initialization.DefaultScriptHandler.getScriptClassPath(DefaultScriptHandler.java:67)
        at org.gradle.plugin.use.internal.DefaultPluginRequestApplicator.defineScriptHandlerClassScope(DefaultPluginRequestApplicator.java:141)
        at org.gradle.plugin.use.internal.DefaultPluginRequestApplicator.applyPlugins(DefaultPluginRequestApplicator.java:54)
        at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:127)
        at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:38)
        at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:25)
        at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
        at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
        ... 43 more         
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT.
Required by:                
    :SBChat:unspecified     
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolveModule(RepositoryChainComponentMetaDataResolver.java:83)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolve(RepositoryChainComponentMetaDataResolver.java:59)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.ComponentResolversChain$ComponentMetaDataResolverChain.resolve(ComponentResolversChain.java:80)
        at org.gradle.api.internal.artifacts.ivyservice.clientmodule.ClientModuleResolver.resolve(ClientModuleResolver.java:44)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$ModuleVersionResolveState.resolve(DependencyGraphBuilder.java:560)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$ModuleVersionResolveState.getMetaData(DependencyGraphBuilder.java:570)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$DependencyEdge.calculateTargetConfigurations(DependencyGraphBuilder.java:256)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder$DependencyEdge.attachToTargetConfigurations(DependencyGraphBuilder.java:230)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.traverseGraph(DependencyGraphBuilder.java:137)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.graph.DependencyGraphBuilder.resolve(DependencyGraphBuilder.java:75)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultArtifactDependencyResolver$1.execute(DefaultArtifactDependencyResolver.java:90)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultArtifactDependencyResolver$1.execute(DefaultArtifactDependencyResolver.java:80)
        at org.gradle.internal.Transformers$4.transform(Transformers.java:137)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:61)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultIvyContextManager.withIvy(DefaultIvyContextManager.java:39)
        at org.gradle.api.internal.artifacts.ivyservice.resolveengine.DefaultArtifactDependencyResolver.resolve(DefaultArtifactDependencyResolver.java:80)
        at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver$1.run(CacheLockingArtifactDependencyResolver.java:41)
        at org.gradle.internal.Factories$1.create(Factories.java:22)
        at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:192)
        at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:175)
        at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:106)
        at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.useCache(DefaultCacheFactory.java:187)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.useCache(DefaultCacheLockingManager.java:64)
        at org.gradle.api.internal.artifacts.ivyservice.CacheLockingArtifactDependencyResolver.resolve(CacheLockingArtifactDependencyResolver.java:39)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultConfigurationResolver.resolve(DefaultConfigurationResolver.java:91)
        at org.gradle.api.internal.artifacts.ivyservice.SelfResolvingDependencyConfigurationResolver.resolve(SelfResolvingDependencyConfigurationResolver.java:40)
        at org.gradle.api.internal.artifacts.ivyservice.ShortCircuitEmptyConfigurationResolver.resolve(ShortCircuitEmptyConfigurationResolver.java:52)
        at org.gradle.api.internal.artifacts.ivyservice.ErrorHandlingConfigurationResolver.resolve(ErrorHandlingConfigurationResolver.java:43)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveGraphIfRequired(DefaultConfiguration.java:359)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.resolveNow(DefaultConfiguration.java:334)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.getResolvedConfiguration(DefaultConfiguration.java:327)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration_Decorated.getResolvedConfiguration(Unknown Source)
        at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:642)
        ... 53 more         
Caused by: org.gradle.internal.resolve.ModuleVersionResolveException: Could not resolve net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT.
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:91)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.process(ComponentMetaDataResolveState.java:66)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ComponentMetaDataResolveState.resolve(ComponentMetaDataResolveState.java:58)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.findBestMatch(RepositoryChainComponentMetaDataResolver.java:116)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.findBestMatch(RepositoryChainComponentMetaDataResolver.java:99)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.RepositoryChainComponentMetaDataResolver.resolveModule(RepositoryChainComponentMetaDataResolver.java:72)
        ... 85 more         
Caused by: org.gradle.internal.resource.ResourceException: Unable to load Maven meta-data from http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml.
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenMetadataLoader.load(MavenMetadataLoader.java:51)
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenResolver.parseMavenMetadata(MavenResolver.java:174)
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenResolver.findUniqueSnapshotVersion(MavenResolver.java:153)
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenResolver.doResolveComponentMetaData(MavenResolver.java:78)
        at org.gradle.api.internal.artifacts.repositories.resolver.ExternalResourceResolver$RemoteRepositoryAccess.resolveComponentMetaData(ExternalResourceResolver.java:409)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CacheLockReleasingModuleComponentsRepository$LockReleasingRepositoryAccess$2.run(CacheLockReleasingModuleComponentsRepository.java:71)
        at org.gradle.internal.Factories$1.create(Factories.java:22)
        at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:242)
        at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:313)
        at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:114)
        at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.longRunningOperation(DefaultCacheFactory.java:179)
        at org.gradle.api.internal.artifacts.ivyservice.DefaultCacheLockingManager.longRunningOperation(DefaultCacheLockingManager.java:56)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CacheLockReleasingModuleComponentsRepository$LockReleasingRepositoryAccess.resolveComponentMetaData(CacheLockReleasingModuleComponentsRepository.java:69)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.CachingModuleComponentRepository$ResolveAndCacheRepositoryAccess.resolveComponentMetaData(CachingModuleComponentRepository.java:297)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.BaseModuleComponentRepositoryAccess.resolveComponentMetaData(BaseModuleComponentRepositoryAccess.java:42)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.memcache.InMemoryCachedModuleComponentRepository$CachedAccess.resolveComponentMetaData(InMemoryCachedModuleComponentRepository.java:75)
        at org.gradle.api.internal.artifacts.ivyservice.ivyresolve.ErrorHandlingModuleComponentRepository$ErrorHandlingModuleComponentRepositoryAccess.resolveComponentMetaData(ErrorHandlingModuleComponentRepository.java:89)
        ... 90 more         
Caused by: org.gradle.internal.resource.transport.http.HttpRequestException: Could not GET 'http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml'.
        at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:83)
        at org.gradle.internal.resource.transport.http.HttpClientHelper.performRawGet(HttpClientHelper.java:69)
        at org.gradle.internal.resource.transport.http.HttpClientHelper.performGet(HttpClientHelper.java:73)
        at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:51)
        at org.gradle.internal.resource.transport.http.HttpResourceAccessor.openResource(HttpResourceAccessor.java:34)
        at org.gradle.internal.resource.transfer.DefaultExternalResourceConnector.openResource(DefaultExternalResourceConnector.java:41)
        at org.gradle.internal.resource.transport.DefaultExternalResourceRepository.getResource(DefaultExternalResourceRepository.java:63)
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenMetadataLoader.parseMavenMetadataInfo(MavenMetadataLoader.java:57)
        at org.gradle.api.internal.artifacts.repositories.resolver.MavenMetadataLoader.load(MavenMetadataLoader.java:47)
        ... 106 more        
Caused by: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
        at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
        at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:572)
        at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
        at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
        at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
        at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
        at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
        at org.apache.http.impl.client.DecompressingHttpClient.execute(DecompressingHttpClient.java:137)
        at org.apache.http.impl.client.DecompressingHttpClient.execute(DecompressingHttpClient.java:118)
        at org.gradle.internal.resource.transport.http.HttpClientHelper.performHttpRequest(HttpClientHelper.java:113)
        at org.gradle.internal.resource.transport.http.HttpClientHelper.executeGetOrHead(HttpClientHelper.java:90)
        at org.gradle.internal.resource.transport.http.HttpClientHelper.performRequest(HttpClientHelper.java:81)

--debug

19:03:53.615 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
19:03:53.623 [ERROR] [org.gradle.BuildExceptionReporter]
19:03:53.628 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
19:03:53.634 [ERROR] [org.gradle.BuildExceptionReporter] A problem occurred configuring root project 'MODChat'.
19:03:53.640 [ERROR] [org.gradle.BuildExceptionReporter] > Could not resolve all dependencies for configuration ':classpath'.
19:03:53.647 [ERROR] [org.gradle.BuildExceptionReporter]    > Could not resolve net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT.
19:03:53.654 [ERROR] [org.gradle.BuildExceptionReporter]      Required by:
19:03:53.658 [ERROR] [org.gradle.BuildExceptionReporter]          :SBChat:unspecified
19:03:53.665 [ERROR] [org.gradle.BuildExceptionReporter]       > Could not resolve net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT.
19:03:53.671 [ERROR] [org.gradle.BuildExceptionReporter]          > Unable to load Maven meta-data from http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml.
19:03:53.680 [ERROR] [org.gradle.BuildExceptionReporter]             > Could not GET 'http://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/2.1-SNAPSHOT/maven-metadata.xml'.
19:03:53.686 [ERROR] [org.gradle.BuildExceptionReporter]                > peer not authenticated
19:03:53.692 [ERROR] [org.gradle.BuildExceptionReporter]
19:03:53.698 [ERROR] [org.gradle.BuildExceptionReporter] * Try:
19:03:53.703 [ERROR] [org.gradle.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.
19:03:53.711 [LIFECYCLE] [org.gradle.BuildResultLogger]
19:03:53.716 [LIFECYCLE] [org.gradle.BuildResultLogger] BUILD FAILED