Error 502/522 High CPU usage

My website is
since yesterday, my website is very unstable. (The CPU usage reaches 100% in the daytime while it is fine at night.) Sometimes, it will show error 502 or error 522. Please help!!!

I am afraid this is not Cloudflare related. Thats an issue on your server. It is best to contact whomever is responsible for the maintenance of your website.