Here's the error that it shows me on the launcher.
2020-05-28 22:22:13,312 main WARN Advanced terminal features are not available in this environment
[32m[22:22:14] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, MrMilkins, --version, 1.15.2-forge-31.2.5, --gameDir, C:\Users\Kirsis\AppData\Roaming\.minecraft, --assetsDir, C:\Users\Kirsis\AppData\Roaming\.minecraft\assets, --assetIndex, 1.15, --uuid, e867300b7a6c36a4b5cfac8597f7f6af, --accessToken, ????????, --userType, legacy, --versionType, release, --launchTarget, fmlclient, --fml.forgeVersion, 31.2.5, --fml.mcVersion, 1.15.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20200515.085601]
[m[32m[22:22:14] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 5.1.0+69+master.79f13f7 starting: java version 1.8.0_31 by Oracle Corporation
[m[32m[22:22:15] [main/INFO] [ne.mi.fm.lo.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[mException in thread "main" [32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/ClassFilter
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.coremod.CoreModEngine.loadCoreMod(CoreModEngine.java:49)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.coremod.CoreModProvider.addCoreMod(CoreModProvider.java:12)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.LoadingModList$$Lambda$313/14770146.accept(Unknown Source)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1374)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.LoadingModList.addCoreMods(LoadingModList.java:88)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.discoverMods(ModDiscoverer.java:125)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:213)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.FMLServiceProvider.runScan(FMLServiceProvider.java:105)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:111)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:115)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler$$Lambda$171/21994158.apply(Unknown Source)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1612)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:512)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:502)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:116)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:63)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:75)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/ClassFilter
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 34 more
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: java.lang.ClassNotFoundException: jdk.nashorn.api.scripting.ClassFilter
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.security.AccessController.doPrivileged(Native Method)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[m[32m[22:22:18] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: ... 34 more
[mJava HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release