Решено При заходе в лаунчер выдаёт ошибку

[FL0CuS1]

java.lang.RuntimeException: Game exit with non-zero exit code!
at dk.xakeps.truestarter.pixelmongui.u.a(SourceFile:260)
at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(Unknown Source)
at java.util.concurrent.ForkJoinTask.doExec(Unknown Source)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(Unknown Source)
at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source)
at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source)

 

[HappySonic]

Попробуй скачать последнюю версию нового лаунчера