"There were errors in Source"

Hello,

I have uploaded several clips in the PhotoJPEG format within a .mov container. All clips were rendered with Davinci Resolve.
Uploading and processing worked and if I go to "My Uploads" and the "edit" page, the preview of the clips play fine. However, once I enter "Save and submit for review" I stay on the same page and on the top of the page there is the message "There were errors in Source".
Does anyone know what the problem is?

This happens with all "PhotoJPEG/Mov" clips from Davinci Resolve. However, other websites accept them and the previews of the clips here on Pond5 play back without any problems.
What can I do to resolve this problem?

Regards,
Jan

Errors in Source usually means there's a field where you select camera or computer animation in the edit page....

Source: Camera - tick that box.. nothing to do with the export, just a field in the edit page that needs to be selected..