Hello,
sometimes i get this error while using a sniper scope, but I am not sure what causes the problem. This time I just aimed at a rogue with the scope and the error happend. The strange thing is that the error only occur in some raids (with same mods, on different maps and sniperscopes), so that I had used the sniper with scope in several raids without getting an error. For example I never experienced any problems with the holo + magnifier zoom.
After the error happend I can no longer shot, switch weapons, move items in the inventory, but it is possible to double click and open the information tab of an item. Also i can run and move to the exit. Back to the global inventory I can again move the items and when I start a new raid, it also works as normal (but can get the error again) without restarting the game.