[1.14.4] Cannot Launch Client: LaunchTesting NullPointer

[unassigned]

Hello, recently I've decided to pick modding back up again, however during my setup of my modding environment I've run into an issue with launching the game after the build and running genIntellijRuns. Everything works fine, the examplemod is there and all syntax seems to be in place. I have changed nothing, yet I get this error when trying to launch:

[14:31:43] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmluserdevclient, --fml.mcpVersion, 20190829.143755, --fml.mcVersion, 1.14.4, --fml.forgeGroup, net.minecraftforge, --fml.forgeVersion, 28.1.65, --version, MOD_DEV, --assetIndex, 1.14, --assetsDir, C:\Users\Blake\.gradle\caches\forge_gradle\assets, --username, Dev, --accessToken, ❄❄❄❄❄❄❄❄, --userProperties, {}]
[14:31:43] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 4.1.0+62+5bfa59b starting: java version 1.8.0_231 by Oracle Corporation
[14:31:43] [main/DEBUG] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Found launch services [minecraft,fmldevdata,fmldevclient,fmldevserver,fmluserdevserver,testharness,fmluserdevdata,fmlclient,fmluserdevclient,fmlserver]
[14:31:43] [main/DEBUG] [cp.mo.mo.NameMappingServiceHandler/MODLAUNCHER]: Found naming services : [srgtomcp]
[14:31:43] [main/DEBUG] [cp.mo.mo.LaunchPluginHandler/MODLAUNCHER]: Found launch plugins: [eventbus,object_holder_definalize,runtime_enum_extender,accesstransformer,capability_inject_definalize,runtimedistcleaner]
[14:31:43] [main/DEBUG] [cp.mo.mo.TransformationServicesHandler/MODLAUNCHER]: Discovering transformation services
Exception in thread "main" java.lang.NullPointerException
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at cpw.mods.modlauncher.TransformationServicesHandler.discoverServices(TransformationServicesHandler.java:137)
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:74)
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:101)

 

So far, in an effort to resolve the issue I have:

- reinstalled and re-setup all java environments, including JRE and JDK.

- reinstalled gradle and my IDE.

- used less recent builds of forge