A file named "Personal Project" has suddenly disappeared and is no longer accessible. When I tried to open the file I received the error message ‘access denied.’ I tried opening the file again, it dissapeared from the recent file lists, and I can’t find it. I have checked the Recycle Bin, but it is not there either.
This file was still present and accessible just 1–2 weeks ago, and I have not made any unusual changes or deletions.

Also I see this message do I need to upgrade to see my file again? or different problems?