Ouch! Maybe do consider switching hosts - that is very expensive. Lots of hosts include it on the standard package.
I can’t believe they won’t even let you install a 3rd party one!
Which error? The Too Many Redirects?
I see you have paused Cloudflare on the site and now get a protocol error. The site appears to still be redirecting to HTTPS but as you have no certificate on the server, can’t serve the page over HTTPS.