Sorry for posting another crash but at least it identifies bugs?
Every time I close my save the game crashes and it crashes over and over with vanilla fix when I try to go back to the title screen. From the crash report, I would say it has something to do with some sort of Entity renderer but I'm no modder.
Crash report: https://paste.dimdev.org/usaxixihec.mccrash

Sorry for posting another crash

Don't be. A bug can only be fixed if it is reported (or I find it myself but I don't actually play as such with BP as others do), so I very much appreciate any reports.

The crash looks similar to #432 but that one only happens in multiplayer. "I close my save" sounds like you're in singleplayer though, is that correct?
If that's the case, could you check if you're having the same issue without any other mods (make a copy of your world) and if that fixes it, try to figure out which mod causes the issue?