[Update: Solved!] Mission Lab Error leading to buggy security glitch that makes game unplayable

[Victor]

There is a bug on that, currently open: Updating to experimental 2021-08-21-2314 causes many errors every move in recent experimental world/saves, but not world/save from 0.F stable · Issue #50977 · CleverRaven/Cataclysm-DDA · GitHub