ArcPro 2.5.1 project save error? Anyone else having issues saving projects that have worked fine for years?

[BrianWygal]

[BrianWygal]

The error only applies to my projects saved on my C:User/Documents drive but not on other drives if I create a new folder/project. This C: path has worked for years an suddenly doesn't. I can open and work in projects stored there but cannot save them. If I try to change a path name in Catalog, it gives me an invalid path error. Any advice?

[KoryKramer]

Have you checked your Write permission to that folder?  Can you save another kind of file in C:\Users\<username>\Documents (like a Word or Excel file)?

[BrianWygal]

Yes, I can save a word file to this path.