whp can help me the sever just kick me out when i try to get in
There is the error
[22:21:06] [Server thread/ERROR] [minecraft/MinecraftServer]: Encountered an unexpected exception
java.util.ConcurrentModificationException: null
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) ~[?:1.8.0_222]
at java.util.HashMap$ValueIterator.next(HashMap.java:1474) ~[?:1.8.0_222]
at net.minecraft.world.World.func_147448_a(World.java:1949) ~[amu.class:?]
at net.minecraft.world.chunk.Chunk.func_76631_c(Chunk.java:856) ~[axw.class:?]
at net.minecraftforge.common.chunkio.ChunkIOProvider.syncCallback(ChunkIOProvider.java:109) ~[ChunkIOProvider.class:?]
at net.minecraftforge.common.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:150) ~[ChunkIOExecutor.class:?]
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:728) ~[MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397) ~[nz.class:?]
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668) ~[MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
[22:21:06] [Server thread/ERROR] [minecraft/MinecraftServer]: This crash report has been saved to: /server/./crash-reports/crash-2021-04-25_22.21.06-server.txt
[22:21:06] [Server thread/INFO] [minecraft/MinecraftServer]: Stopping server
[22:21:06] [Server thread/INFO] [minecraft/MinecraftServer]: Saving players