First of all, this must be a bug but there's no way to submit a bug apparently: I only get predefined answers from the "Bug" menu entry. This is unacceptable.
My problem is that when submitting the last step of the "Data Use Checkup" procedure, I keep getting the message "An error occurred while submitting the Data Use Checkup. Please try again later." This is also unacceptable: Meta is forcing me to submit some information, the submit doesn't work and I have no way to get help other than posting a rant on a forum
I'm disgusted and will keep away from this platform in my future projects.