When reviewing First Posts (but probably Late Answers as well), if you use your last (up/down)vote for the day, you can't complete the review. See the GIF below, after clicking the 'I'm Done' button the review counter stays on 1,146.
Just to be sure, I know that after this review I'm not able to review First Posts anymore, and that is fine. However, I should be able to complete this review.
This issue is similar to Downvoting an answer during review puts user below minimum reputation requirement for reviewing and would be solved if some of the checks whether you're able to review (required reputation and if you haven't reached the daily voting limit) are moved to the beginning of the review rather than upon completion. Some other checks (number of reviews per day) should probably be kept at the end.