Hi @referente.google thanks for letting me know. I just spoke to our expert and it looks like Google rolled out a change in their system and did not notify us about the change. We are working quickly to fix the issue. For now, there is nothing more you can do so just wait and hope that we can get the hotfix rolled out soon!
Edit: Fix has been rolled out. Please see this post as the fix requires users to go through some additional steps: Google Update to App Review for Under 18 Users - How to make sure your apps are accessible