Google forms submissions on external sites can occasionally be blocked by EdOps Data Loss Prevention (Policy). The error message will include the text "Uploading files is not permitted when data loss prevention is enabled for your domain. Contact your domain administrator if you think this is a mistake. "
The solution is to use a non ed-ops.com email account. You can use your personal email account or create a new business account on gmail.
Note: This happened to Sherah LeBoeuf on 12/14/21
