It's fixed. I've retired the release, i could not download the huge mod (near 400 MB!) yesterday. It was an old bug fixed during the Level refactoring, a bad NULL return value in AActor::StaticSpawn. Very unfortunate, there were reports of PB being unstable at Doomworld with older versions of GZDoom (edit: it was fixed in 4.0) but since the mod gives a wall of errors i didn't pay much attention last night. Later i'll upload 3.83a.
Thanks Kamil for the reports!
Edit: today's devbuild shouldn't crash.
https://devbuilds.drdteam.org/lzdoom/