What did you do before this issue happened? For example:
– Did you update WP? Yes? Was it auto update or manual update? Also, updated from what version?
– Did you install/update plugins?
– Did you install/update theme?
– What theme are you using currently? Where did you download ir from?
– Are ALL your plugins and the current theme up to date?
– Have you moved your site to new server, new domain, or new directory
– Did your site work without any issue before (No hacking, no error, etc.)?
– Have you checked your server error logs?
– https://codex.www.ads-software.com/Forum_Welcome#Include_as_Much_Information_as_Possible
