There are others reporting the same “crashing when attempting to loot” issue who play with no mods.
I also have the same problem and play with lots of mods but not Pickup+ so it’s not specifically Pickup+ causing the issue. Pressing F To Loot all crashes the game 50 50
Also as per my comment on the other thread - my server is crashing not long after I attempt to loot with E or F key. Any corpse looting, not just Loot All