Missing actor scripts freeze the game

Tested with 0.48 RC4, 5 and daily builds. OS: Win 10. MW Version is german retail version.

Steps to reproduce:

1. load savegame in 0.48 RC4 or above
2. try to fight Scrib -> freezes game window and throw many error messages (see next point)
3. see in Status window: Error in frame: Script 'plx_Scrib_AI' not found

Tried to load savegame in vanilla 0.48 RC4 and saved again as new savegame. -> doesn't help.

Cannot test if same behavior is with mod, because i don't know which mod it caused (deleted all mods).

Expected behavior is to delete remnants of former mods at loading savegame, so a newer savegame will not have this "artefacts" or engine ignores this and can handle this with some kind of fall back. Kampftest.omwsave