Error executing task on Client java.lang.NullPointerException at csv.d(SourceFile:199) at dhi.a(SourceFile:1970) at my.a(SourceFile:122) at my.a(SourceFile:16) at kc.a(SourceFile:15) at kc$$Lambda$1835/1813732760.run(Unknown Source) at agh.h(SourceFile:135) at agl.h(SourceFile:23) at agh.p(SourceFile:114) at agh.bf(SourceFile:99) at cvi.d(SourceFile:915) at cvi.b(SourceFile:411) at net.minecraft.client.main.Main.main(SourceFile:154)

When joining a multiplayer server