Playing in 2022: I got the wrench VERY VERY early in the game
so I instantly got to the south-west corner, but the wrench did not work. Even worse: The frob highlight did not work too, which worked when starting the mission. However I thought: OK, some other stuff to do and played on. Everything is done now except for the wrench still not working. The frob issue is now extended: I cannot frob or activate anything, cannot open doors and so on. There is even no highlight that I could frob anything as it usually is. Watching the video I found: OK I was doing the right thing.
So for now this mission is stuck for me. Savegame is available, so it is reproducable. Loading another savegame (over two hours old) frobbing is fine, but I am not in the mood to retry.
Is there a way to reactivate frobbing to finish this mission?