When answering a question get 503 service unavailable
I’m using AnsPress 3.0.7. When I answer a question on a page. The answer seems to post and there is a spinner, but the screen never refreshes and throws an error:
jquery.js?ver=1.12.4:4 POST http://localhost/wp-admin/admin-ajax.php 503 (Service Unavailable)
When I refresh the page, the answer is there. Any idea on how I can fix this?
Thanks