When I upgraded my SSD in my old 64gb model to just a 256gb, I had to reinstall all my games from scratch, including D4. Nothing would work otherwise that I had on my old SD card. After that I had no problems. When I get back from a concert this evening I can look and see what version of proton my D4 is running so that I can say with certainty that it is working and let you know

I haven’t got the mask yet but since I mainly run arc warlock at the moment I’ll have to redouble my efforts to try and obtain it. Other than lost sectors, does it drop from any other loot pool?