I wonder if that contributed to the issue?
Last I checked, Windows had three or four different “sleep” levels. Snooze, nap, suspend, nod-off, sleep, and they all mean different things. I never allow production machines to do anything on their own, sleep, backup, update, anything. It’s too dangerous. The one exception is the laptop can go to sleep after an hour of no activity and only if it’s on batteries. If it’s plugged into the wall, it will stay up for days. Yes, the machine warns me about that, but if that’s what the production demands, that’s the way it is.
As Jademan above, there was an early version of Audacity, quickly removed from service, which caused show failure if anyone used Save As:.
This is an Audacity Project in current design. Also as above, this is going away.

They come in sets. They have to be in the same location or folder to succeed. You can’t put the AUP file inside the _DATA folder. They have to have the same name and they have to be the name you gave them inside Audacity.
The AUP file is a text file and will open in any text editor (do not save anything). They have English-like programming words and the header has the name of the show (red box).

This one has been cleaned up for the picture, but yours will have similar words.
Open up the _DATA folder and you should see nested folders with little AU sound files. Each AU file is six seconds long and will open and play in Audacity.
Everything has to match. If everything looks right and the show still won’t open, then the AUP file may be damaged even if it’s not missing, or the show has some other serious or fatal problem. These show files can have normal computer problems in addition to Audacity problems.
One of the other forum posters was able to rescue a damaged project by hiring a local city digital professional to come and put it all back together. Without real-world hands-on (Audacity doesn’t offer that), that may be the end of your show.
One of the Producer’s jobs nobody likes to talk about is to decide when to give up and shoot the production fresh and edit it again.
Koz