Powerapps import unsuccesfull

After creating a custom entity and choosing the CSV file that I wish to import, Powerapps is showing the Mapping Status as 'Matched'. However when I go to import data from this CSV I receive a 'Import failed' message along with a notification saying 'Your import was unsuccessful' with no further information. Is there anywhere that I can access an error log to show any further details, or does anyone have an idea of how to address this generic error?

Thanks!