SSL_ERROR_NO_CYPHER_OVERLAP when cloudflare enable

The error ‘SSL_ERROR_NO_CYPHER_OVERLAP’ is typically due to a misconfiguration in the SSL setting which leads to a mismatch in encryption algorithms between your server and Cloudflare. You can try the following steps:

  1. Review your SSL/TLS settings on Cloudflare
  2. Check the TLS version - you may need to lower it down to TLS 1.2
  3. Make sure your server cipher suite aligns with what Cloudflare is expecting.

For detailed instructions, you can refer to the Cloudflare community tip on resolving this issue: Fixing SSL_ERROR_NO_CYPHER_OVERLAP.