A. Kiosk mode was enabled on the form, so completion actions did not run.

B. The 'email' form field was set up to exclude free email addresses, so even though they submitted the form successfully, the Gmail address they used prevented the completion actions from running.

C. The client has a visitor filter set up to filter activities from their IP address. Completion actions do not occur on filtered visitors.

D. The client did not un-pause the completion actions.