Trying to join a single player world throws java.lang.OutOfMemoryError: Metaspace

Removing BDLib and the dependency resolves.

crash-2021-12-12_19.22.39-server.txt

This error means JVM has ran out of RAM allowed for class metadata.
Normally there should be no limit on that, unless you (or your launcher) passes a -XX:MaxMetaspaceSize argument when running java.
So either increase or remove the limit there.