Is the button greyed out, or just nothing happens when you click "submit review"? Usually, you should see a dialog box and a checkmark showing that your review was successfully submitted. Then on your Account Health page, you will see a message at the top of the page that says that an Admin has submitted a review.
Contact support, althought they are useless 99% of the time. Otherwise, make sure that the person who is submitting or trying to submit the review is an Admin on the Page/business account and is associated with the assets (you can do that in business settings