After I added Cloudflare and update to pro my site is showing Unsupported protocol and not coming up

After adding cloudflare my site has been unable to reach. i have even transferred back to my original DNS and the site site not reachable. thinking it is SSL issue but i do not know how to solve this.

the site is talkofnaija.com

the error

This site can’t provide a secure connection

talkofnaija.com uses an unsupported protocol.

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

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Unsupported protocol

The client and server don’t support a common SSL protocol version or cipher suite.

#CommunityTip SSL_ERROR_NO_CYPHER_OVERLAP