Hi. I'm currently using ArcGIS Pro 2.9.1 & I have begun to have a problem saving my project. I can save here & there but eventually, seemingly at random, I'll get the 'Project Save Error' dialogue box below.

It seems like every time this happens, I also see that there is a backup in progress?

I have waited hours for these backups to complete but they never do & I am forced to restart ArcGIS losing all edits & starting from my previously saved project. What is causing this? Would turning off the automatic backups solve this issue (I currently have it set to backup every 30min)? I am running Arc on my MacBook Air with 8G of RAM & the A1 chip using Parallels Desktop. Could that be the issue?
Thanks in advance.
Daniel