I get this type of message when working remotely with a slightly flaky network connection, but I see your first screenshot refers to your C: drive …
It looks like you're trying to save in a Dropbox folder - try moving it to a non-synched local folder.
Thank you for your response. I moved the files to my documents folder and have not had the issue again so far.
Dropbox had a recent update maybe that was the issue? I'm not sure why syncing would cause this?