Hey everyone, I've dowload a Javascript Libs for launch minecraft, all worked properly, the forge support work too, but since forge 1.13 here is some crash, there is error :
 

 

[10:36:13] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, fmlclient, --fml.forgeVersion, 28.2.0, --fml.mcVersion, 1.14.4, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20190829.143755]

main.js:28

[10:36:13] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 4.1.0+62+5bfa59b starting: java version 1.8.0_251 by Oracle Corporation

Exception in thread "main"

main.js:28

java.lang.NullPointerException at net.minecraftforge.fml.loading.ModDirTransformerDiscoverer.scan(ModDirTransformerDiscoverer.java:56) at net.minecraftforge.fml.loading.ModDirTransformerDiscoverer.candidates(ModDirTransformerDiscoverer.java:37) at cpw.mods.modlauncher.TransformationServicesHandler.lambda$discoverServices$13(TransformationServicesHandler.java:137) at java.util.stream.ReferencePipeline$3$1.accept(Unknown Source) at java.util.Iterator.forEachRemaining(Unknown Source) at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source) at java.util.stream.AbstractPipeline.copyInto(Unknown Source) at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) at java.util.stream.AbstractPipeline.evaluate(Unknown Source) at java.util.stream.ReferencePipeline.collect(Unknown Source) at cpw.mods.modlauncher.TransformationServicesHandler.discoverServices(TransformationServicesHandler.java:137)

main.js:28

 

PS :  the library uses the json file well with the main class and the startup arguments. The owner of  the lib has open an issue on it and wait for help

I've already install forge in the directory launch. There is no way for launch it with an other launcher ?

 

The author does not know more than me, with the error you can't say me what wrong ?