Seconding that as unable to find an issue, after fresh game reinstall, importing MB+ or NoMB json playset gives CTD. (+tried updating the downloaded playset mods couple times to ensure its not corrupt download)

Thanks for update. Still getting CTDs for noMB & MB+ versions on load after purge/reinstall mods, and re-importing json file a few times. Here is the error log from crash folder for noMB
https://jumpshare.com/s/Bl9CCbxsvSl0wFkfVuZL
error log for MB+
https://jmp.sh/s/ZxuoJRLzhJ10rWO0YEsx
Would appreciate any ideas..

same problem occured after 01/27 update

I just tested out the "muslim enhancement" caused crash but don't konw the reason.
currently I just turn it off and go on playing

I have this same issue as well, does anyone have a fix for it? It only occurs after I click the "play as any ruler" option

Try deleting or renaming the gamestate.ck3 file in the 'Documents\Paradox Interactive\Crusader Kings III' folder. This file is a save file from the last play session and I have found that if you try to go from a playset with a total conversion mod to this one, it crashes.