Alrighty, here goes my third bug report of the day. This happens every couple times Premiere auto-saves or also when I manually save a project, and it refuses to save in the same location I've had the project the entire time. Currently, save as and renaming the project file allows it to save, and sometimes if I just try to save again it will work, but it is very frustrating and I'd hate to lose progress due to it not being able to save.
I get that too sometimes, but it's always if I hit save too many times in a row or I hit save right before or right after an autosave happens. I think what is happening is that if I hit save while Creative Cloud files are still syncing it will throw that error sometimes. I just wait a moment and hit save again.