I tried your save game and got the same result. I tried everything I could think of, including moving your entire stash to the Bar, but on returning to Radar the game still crashes after ~50 secs, just as you said.
You said that the crashes only started after you took Syak's mission. If it is something to do with that mission (I can't think why, but what do I know?), the only other thing I can think of to try is to use an info portion to complete the mission without actually taking it. The info portion is sak_repair_box_done
. I don't have your save from before taking the mission, but I tested it in my own game before talking to Syak and he then offered me his next mission (to
Of course, I haven't been having the same problem in my game, so I don't know if this will help you, but it might be worth a try.
Alternatively, to avoid the first task altogether, sak_gold_fish_start
should jump straight to the second task. (if he then offers the first task again, I would ignore it and go straight for the one about useful artefact recipes (his third task).
NB: You would miss Syak's reward for his tools mission:
The recipe and suit can be spawned in if you really want them, and the door code should work regardless.