no saving, no exporting

O I imported Audio, edited it and now want to “save” or “save as” , better yet, “export” as MP3 and the programme insists “file not found” irrespective of whichever option I choose from the toolbar. And the file is open and playing and quite normal in every respect in Audacity. Any suggestions how I can “force” a save ?

What is the full and exact error message?
Which exact version of Audacity?

I solved the problem by adjusting a setting.

For the benefit of others, perhaps you could describe the solution in more detail.