Documents.Add Stops Code Execution

I have a macro that I've been using for years and today it began stopping the code execution after Documents.Add (it adds the document and then stops before the next line). It doesn't Pause the code - it Resets it.

I went to a previous version of my macro and that one works fine.

Any ideas what might be going on with this?

I've seen some similar help requests on this subject on other forums but they were two years ago talking about "builds" (1807) which I don't understand.

Not sure what I did, but it stopped.