Saving error

I’m continually getting this error message when I try to save a project or when the project autosaves. The directory exists. I also cannot create any new projects saved in any location. I’m baffled. Any thoughts?

Here’s the error message when I try to create a new project.

If anyone cares, or encounters something similar, apparently a recent Win10 update automatically enabled a security feature called “controlled folder access,” After putting Scrivener on the approved app list it magically worked again.