j'ai des erreurs dans les logs de mon jeux minecraft

Unknown custom packed identifier: minecraft:register

01:12:22.812 Error executing task on Client java.lang.NullPointerException at cti.d(SourceFile:199) at dkc.a(SourceFile:2004) at nb.a(SourceFile:122) at nb.a(SourceFile:16) at ke.a(SourceFile:21) at ke$$Lambda$1856/144829871.run(Unknown Source) at agq.h(SourceFile:144) at agu.h(SourceFile:23) at agq.q(SourceFile:118) at agq.bh(SourceFile:103) at cyc.e(SourceFile:915) at cyc.b(SourceFile:410) at net.minecraft.client.main.Main.main(SourceFile:155) 01:12:22.813 Error executing task on Client java.lang.NullPointerException at cti.d(SourceFile:199) at dkc.a(SourceFile:2004) at nb.a(SourceFile:122) at nb.a(SourceFile:16) at ke.a(SourceFile:21) at ke$$Lambda$1856/144829871.run(Unknown Source) at agq.h(SourceFile:144) at agu.h(SourceFile:23) at agq.q(SourceFile:118) at agq.bh(SourceFile:103) at cyc.e(SourceFile:915) at cyc.b(SourceFile:410) at net.minecraft.client.main.Main.main(SourceFile:155)