Err ssl version or cipher mismatch

[malinaitwe10]

my subdomain keeps bringing this error.
“ERR_SSL_VERSION_OR_CIPHER_MISMATCH yet the primary/main domain is working perfectly.”

what causes this and how can I fix it?

Thank you

[cloonan]

Your post included an error message of ERR_SSL_VERSION_OR_CIPHER_MISMATCH so I clicked it, some suggestions here:

Community Tip - Fixing ERR SSL VERSION OR CIPHER MISMATCH in Google Chrome

Error Try the suggestions in this Community Tip to help you fix ERR SSL VERSION OR CIPHER MISMATCH in Chrome. Background A website using HTTPS performs a series of steps between the browser and the web server to ensure the certificate and SSL/TLS connection is valid. These include a TLS handshake, the certificate being checked against the certificate authority, and decryption of the certificate. If Chrome detects an issue, it might display “ERR_SSL_VERSION_OR_CIPHER_MISMATCH” which prevents a…

[malinaitwe10]

It is not a browser problem because I have tried using other computers too. I think it has something to do with the DNS records. I am not sure though.

The issue is with 1 particular subdomain. The main domain and other subdomains work perfectly.

I need guidance.

[michael]

@malinaitwe10

1 particular subdomain.

In the article linked to twice in this thread there are several solutions. As you say it is a subdomain, it might be that you are using https://www.subdomain.example.com or similar. The default Cloudflare Universal certificates only;y cover one level of subdomain like https://subdomain.example.com. For greater levels of subdomain you would need to subscribe to Cloudflare Advanced Certificate Manager.