Here's the Chrome Browser (Version 148.0.7778.217( connecting to thi URL:

Apparently Chrome thinks this certificate is "valid"
 
Here's the detail of the certificate Chrome is using. This is a certificate issued by Let's Encrypt

 
The certificate's serial number.

 
The URL where the issuer's current Certificate Revocation List is published.

 
Retrieving the Certificate Revocation List

 
The header of this revocation list.

 
Showing the inclusion of this certificate in the revocation list.

 
Safari browser (26.5 (21624.2.5.11.4)) also shows that this revoked certificate is "valid".

 
Only the Firefiox browser (version 51.0.4) correctly identifies that this sites certificate has been revoked!
