Error executing task
java.util.concurrent.ExecutionException: java.nio.file.FileSystemAlreadyExistsException
	at java.util.concurrent.FutureTask.report(FutureTask.java:122)
	at java.util.concurrent.FutureTask.get(FutureTask.java:192)
	at k.a(SourceFile:199)
	at dft.v(SourceFile:154)
	at net.minecraft.server.MinecraftServer.run(SourceFile:526)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.nio.file.FileSystemAlreadyExistsException
	at com.sun.nio.zipfs.ZipFileSystemProvider.newFileSystem(ZipFileSystemProvider.java:113)
	at java.nio.file.FileSystems.newFileSystem(FileSystems.java:326)
	at java.nio.file.FileSystems.newFileSystem(FileSystems.java:276)
	at un.a(SourceFile:114)
	at vb.a(SourceFile:137)
	at vg.a(SourceFile:80)
	at pp.a(SourceFile:139)
	at vg.c(SourceFile:123)
	at vg.a(SourceFile:106)
	at net.minecraft.server.MinecraftServer.a(SourceFile:1350)
	at net.minecraft.server.MinecraftServer.aE(SourceFile:1333)
	at net.minecraft.server.MinecraftServer$$Lambda$1743/1233680114.run(Unknown Source)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at k.a(SourceFile:198)