The amount of domains on your account doesn’t affect individual domain performance. 5xx errors are due to problems with your server not letting Cloudflare connect to it:
Error
Try the suggestions in this Community Tip to help you fix Error 524 : A timeout occurred.
Background
Error 524 error indicates that Cloudflare made a successful TCP connection to the origin web server, but the origin did not reply with an HTTP response before the connection timed out. Typically, Cloudflare waits 100 seconds for an HTTP response. If the origin doesn’t respond in that time, Cloudflare closes the connection and you’ll see “Error 524 : A timeout occurred”.
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Error
Try the suggestions in this Community Tip to help you fix Error 521 : Web server is down.
Background
A 521 error happens when we are unable to make a TCP connection to your origin server. Specifically, Cloudflare tried to connect to your origin server on port 80 or 443, but received a connection refused error. This is often caused by security or firewall software and happens if the origin server has directly refused Cloudflare’s proxy request.
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Quick Fix Ideas
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