I don't know but your site seems very sick. It's running incredibly slowly. I don't know anything about Cloudflare but that probably explains the timeout. You're also running an old/unsupported version.
I'm not happy about all those "to be deleted" plugins.
If you haven't done so already, enable
Debugging (probably in config.php under the circumstances). When did it last run properly? What changed since then? Don't say "nothing" because something did.