Won't let me join world in Snapshot 22w16b

Hi. Randomly when I'm just exploring my Minecraft world, it kicks me out and says:
The game crashed whilst ticking entity
Error: java.lang.NullPointerException: Cannot invoke "dnm.a()" because "$$1" is null
Exit Code: -1
There doesn't seem to be a reason for this crash, and now I am completely unable to enter the world. This is the second time this has happened. The first time I was able to edit my NBT data which fixed it, but I lost all my items. Please help! Thank you!