Back-up Failure

I’ve been using this software for a couple of weeks now with no problem. Now when it closes it is unable to do the automatic back-up.

I get this message:

“Could not create project (name of project)”
“Could not create project at C:/scrivener back-ups (name of project)”.

I tried changing the back-up location to see if that would fix the problem but I receive the same message.

I am running Windows 10 Pro on my ThinkPad.

Any help is appreciated!