Cloudflare All-time-classic: How to fix Error code: SSL_ERROR_NO_CYPHER_OVERLAP

Wow, interesting!
I am sorry to hear that one.

May I ask in which Web browser do you get this error?

I assume you already looked at the below two, right?

And also this one too?:

  1. Was the IP address of the origin host / server changed in between? (changing hosting provider, new server, new IP due to being blocklisted, etc.)
  1. What does it state under the SSL/TLS → Edge Certificates tab of Cloudflare dashboard at your Cloudflare account for your domain name? - Is the SSL certificate provisioned (active, enabled, deleted, pending) or not?
  1. Did you purchased a dedicated one (like Advanced Certificate Manager) or using your own which is installed at your origin host / server (like Let’s Encrypt or some purchased like from NameCheap, etc.)?

When was it? Can you try to contact Cloudflare support again and may I ask you to post your ticket number here, if so?

  1. To which one TLS minimum version is set to at Cloudflare dashboard? And which TLS version / ciphers does the origin host / server support?

  2. Kindly, see below articles how to propperly setup SSL for your domain …

Furthermore, here is a way to re-check if you correctly setup the SSL for your domain with Cloudflare:

If any other issues appear, follow the needed steps for troubleshooting from article below:

Regarding available SSL options at Cloudflare dashboard, check here:

In case you do not have an SSL certificate, you can use Cloudflare SSL, if so, kindly make sure you follow the instructions as follows on the below article to setup an SSL certificate using Cloudflare CA Origin Certificate:

Last but not least, kindly have a look here for more information regarding correct SSL settings: