Error 520 and 500 appears whole day

These two error shows whole day. been with my hosting provider(bluehost) and support here but I am still confused where to get this fixed and how to fix this issue.

Have you started any of the documented troubleshooting steps?

Bypassing the :orange: Cloudflare proxy by setting the relevant records to :grey: DNS-only is a good starting point. You will likely need to coordinate with your host or spend some time in your server logs if this is your own host (such as a VPS).