Minecraft 1.12.2 forge modding, setupDecompWorkspace is not working

Hello, I am trying to make a mod for Minecraft Forge 1.12.2, mdk file forge-1.12.2-14.23.5.2854-mdk. Problem is, when i right-click inside this folder, open Powershell and run the ./gradlew setupDecompWorkspace eclipse command, it comes up with an error log:

forge-1.12.2-14.23.5.2854-mdk> ./gradlew setupDecompWorkspace eclipse To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: https://docs.gradlDaemon will be stopped at the end of the build stopping after processing

FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring root project 'forge-1.12.2-14.23.5.2854-mdk'.

Could not resolve all artifacts for configuration ':classpath'. Could not resolve net.minecraftforge.gradle:ForgeGradle:3.+. Required by: project : Failed to list versions for net.minecraftforge.gradle:ForgeGradle. Unable to load Maven meta-data from https://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml. Could not get resource 'https://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. Could not GET 'https://files.minecraftforge.net/maven/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Failed to list versions for net.minecraftforge.gradle:ForgeGradle. Unable to load Maven meta-data from https://jcenter.bintray.com/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml. Could not get resource 'https://jcenter.bintray.com/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. Could not GET 'https://jcenter.bintray.com/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Failed to list versions for net.minecraftforge.gradle:ForgeGradle. Unable to load Maven meta-data from https://repo.maven.apache.org/maven2/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml. Could not get resource 'https://repo.maven.apache.org/maven2/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. Could not GET 'https://repo.maven.apache.org/maven2/net/minecraftforge/gradle/ForgeGradle/maven-metadata.xml'. sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 6s

Could somebody please help me with this? I am not sure what else to try.