421 Error with Lets Encrypt Cpanel

My domain is: hackintoshzone.com

I ran this command:
yum install ea-apache24-mod_http2

My web server is (include version):
Dedicated Server

The operating system my web server runs on is (include version):
Centos 7

Lets encrypt certificate causing me 421 error with http2 in a cpanel server
Why?

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From what I see now, you don’t have HTTP 421.
Your domain currently throw “Invalid certificate” warning for hostname mismatch.

You can try to reissue your certificate and see if your website works.

P.S. HTTP Error 421 is an issue within your cPanel server. Depends on how your server / ACME client handle the request, you should find help from the corresponding support team.

Thank you

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