Thanks for reading, I realized that I am getting this error because the moved files have original URL embedded somehow.
I received this message because I wanted to update our production form (changed Text(string) to Rich Text) but was afraid to publish form. I wanted to verify that the change made to form would not generate any problems or errors. I therefore copied some files from our production environment to another site (test). Republished the form with new changes and now the .xml files are not opening. How do I have these moved files correctly point to this SharePoint site (test)?
Any suggestions would greatly be appreciated.