Invicti detected a revoked SSL certificate. Certificate revocation is a process of invalidating an issued SSL certificate. Sometimes a Certificate Authority may revoke an SSL certificate if, for example, a domain is suspected of phishing/malware/etc, if the certificate owner has violated the terms and conditions, or if a certificate was wrongfully issued.
It can impact both website and the users:
The process of reissuing revoked SSL certificates varies depending on the host or the certificate authority used. Please refer to the corresponding documentation.