Error when uploading TurboTax desktop file to online

I am trying to upload my Turbo Tax desktop 2018 file to do my taxes for 2019 via Turbo Tax online but I keep getting an error when I try to upload

 

The selected file is NOT a previous year tax file or it is corrupted. Choose a different file and try again.

 

I know the file is not corrupt as I can still go into the desktop software and view everything fine. Any tricks to make this work?