Proxy doesn't work but DNS only works fine. Port 80 works 443 looks closed

Happy new year!

For some reason when cloudflare is proxied I get a 521 error via both http and https.

When I set the CNAME to DNS only I can reach the http page but get the same 521 error with https.

Is this some configuration issue with cloudflare or is it just an issue with NGINX proxy manager.

Hello,

Were you able to review our documentation for resolution on 521 errors?

If you are using full or full strict SSL your domain will need to respond over port 443.

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