I also have the same problem. Surprisingly, I have two subdomains linking to a VPS. The SSL of one subdomain works fine while the other one shows ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Any ideas?
Some ideas in quickfix area:
Can you share subdomain names?
Thank you so much for your help! I used a two-level subdomain and it turned out to be the problem. I really appreciate your help!
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