Gateway Connection Error

[NJ81858]

I am setting up my gateway connection for scheduled refresh, but I am getting some errors. This is what the error details are:

I believe that this is what is causing the error, and I need to get rid of it even if that isn't the issue:

So first off I need to get rid of that file within my gateway, and then I need help getting my refresh to work.

Unfortunately I can't share my pbix file or unmask the data files, so I apologize in advance!

[lbendlin]

The actual issue is that you don't have access to one of the sources.  Either remove that source, or get access.

Note:  You may want to avoid file connections. In nearly all cases a folder connection is preferable.