Cannot access reports in App - No permissions to underlying dataset

Try going to manage permissions of the dataset and add permissions there (while it is still in the app).  It will still say the permissions are provided by the app, but you should get a permissions granted message or something along those line.  I think this worked for me (though I did other steps, this was the only one that was unique to getting the reports to work).  Not the best work around, but it works for now.