Updates after review.

Author: angelampcosta

src/content/docs/support/troubleshooting/cloudflare-errors/troubleshooting-cloudflare-5xx-errors.mdx

@@ -133,7 +133,7 @@ To resolve a `503` error, first determine whether the issue originates from your
 
 If the error does not contain `cloudflare` or `cloudflare-nginx` in the HTML response body, contact your hosting provider to verify if they rate limit requests to your origin web server.
 
-####  503 Erro with `cloudflare` or `cloudflare-nginx`
+####  503 Error with `cloudflare` or `cloudflare-nginx`
 
 If the error contains `cloudflare` or `cloudflare-nginx` in the HTML response body, a connectivity issue occurred in a Cloudflare data center. Provide [Cloudflare support](/support/contacting-cloudflare-support/) with the following information:
 
@@ -202,7 +202,7 @@ Contact your hosting provider or site administrator and share the necessary [err
 - Review origin web server error logs to identify web server application crashes or outages.
 - Confirm [Cloudflare IP addresses](https://www.cloudflare.com/ips) are not blocked or rate limited.
 - Allow all [Cloudflare IP ranges](https://www.cloudflare.com/ips) in your origin web server's firewall or other security software.
-- Confirm that — if you have your **SSL/TLS mode** set to **Full** or **Full (Strict**) — you have installed a [Cloudflare Origin Certificate](/ssl/origin-configuration/origin-ca).
+- Confirm that — if you have your **SSL/TLS mode** set to **Full** or **Full (Strict**) — you have installed a [Cloudflare Origin Certificate](/ssl/origin-configuration/origin-ca) or a certificate matching the [requirements for these modes](/ssl/origin-configuration/ssl-modes/#custom-ssltls).
 - Find additional troubleshooting information on the [Cloudflare Community](https://community.cloudflare.com/t/community-tip-fixing-error-521-web-server-is-down/42461).
 
 ## Error 522: connection timed out