[19:44:21] [Server thread/FATAL]: Error executing task
java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException
        at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_211]
        at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_211]
        at net.minecraft.util.Util.func_181617_a(Util.java:51) [h.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:846) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:473) [nz.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:783) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:637) [MinecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]
Caused by: java.lang.ArrayIndexOutOfBoundsException

就这些？咋看出来呢

就这些

这个是正常报错...开个
[综合|优化]Console Spam Fix —— 让控制台变得干净[1.7-1.15]
https://www.mcbbs.net/thread-912870-1-1.html
(出处: Minecraft(我的世界)中文论坛)
即可...

对服务器不影响吧。