[1.19.2] Client prompts [Internal Exception:java.lang.NullFointerException:] when I join my own server

[ChanLicher]

The full info is [Internal Exception:java.lang.NullFointerException:Cannot invokejava.util.function..Function.applycob.ectbecause the return value ofava.util.Map.getcob.iectis null].
My server is built in Synology Docker and it is just by my side. In fact, I can still joined my server yesterday, but I can't do it any more now. But it doesn't crash.
I have tried rebuilt a new world, reduced mods and even rebuilt this docker container. And it doesn't work...
What's wrong with it?

[ChanLicher]

I solved it finally. It is the 8.2.0-beta.3 version of Expanded Storage mod that causes this issue.