I had MSFS installed on an old drive, with the packages folder in the root of that drive. It was painfully slow, so I put in a fast SSD and used Steam to move the installation to it. My packages folder is still there on the root of the old drive, but it’s now empty and the files it contained are nowhere to be found. MSFS launches and asks for the folder and begins again with the full download.
I cannot believe how bad this software is. The first install on a fresh copy of Win 11 was a buggy mess (impossible to select the password field for Xbox login on multiple attempts, crashed on the installer, no progress bar…) Now a simple task of moving it’s install and it’s back to another twelve hour download.
Anyway, a cautionary tale. If you are thinking of moving it’s install location, back up that packages folder first.
I feel your pain (Unable to sign in to XBox (Steam version on a PC ) - #3 by trgz)
TLDR version: if you get that unable to sign-in again, then it seems that Alt+Enter (simply changes it to windowed?) might allow you to pick an account/sign in - it worked for me the second time it happened.
I’ve also learnt not to validate my MSFS game files in Steam (you lose the lot)
It’s mind boggling, like they never test the fresh install flow.
Mine was different to your issue - I had the fields there, I could get to them using the keyboard but couldn’t type anything even though they had focus. It also had a mouse pointer that was massive. A great first impression…
I moved eight games from that drive via Steam. Seven of them had no issue at all. If MSFS cannot be moved then it shouldn’t be on me as a customer to somehow know that ahead of time. Deleting 180Gb of critical data cannot be expected behaviour.