If you encounter this error, please update the Submission Type settings in your assignment to ensure CoGrader can successfully export submissions to Canvas.

Follow the steps below.

Step 1: Go to your Dashboard and select the course

Step 2: Select the assignment

Step 3: Click on 'Edit'

Step 4: Tick the option 'Website URL' and save

Done! Now you can go back to CoGrader and try to export the submission again.

If you have further questions, feel free to reach out.