Test it first in an isolated environment or on page directly (not in popup) and see if it happens there or not as your source should just be ‘current page taks files’ and the type of the RG can be files or just text, and I’d say text simply because all you need is the URL of the file, so if you use text, your source will be ‘current page tasks files urls’…unless you are trying to show the file contents from within the RG which is not recommended.