Hi @Rockstar55 ,
Please try to log out of the Flow account and log back in.
Then reconfigure or update Excel online connection and create a similar Flow check to see if the problem still exists.
I did a test on my side and can normally select the expected Table from the Excel file. When configuring File, please select the specified File through File Browse.

This seems to be a temporary error. MS Flow Support has not updated any issues with the service.
Please try it a few times.If the problem persists, please let us know.
Best Regards,