See: https://urlquery.net/report/0044c17a-e2b1-4350-8dab-090d29c3fd36 (moved permanently).
See: https://aw-snap.info/file-viewer/?protocol=not-secure&tgt=mxr-zlb.vips.scl3.mozilla.com&ref_sel=GSP2&ua_sel=ff&fs=1
F-status and recommendations: https://observatory.mozilla.org/analyze.html?host=mxr-zlb.vips.scl3.mozilla.com
Certificate not installed correctly: mxr-zlb.vips.scl3.mozilla.com
You have 1 error
Wrong certificate installed.
The domain name does not match the certificate common name or SAN.
DigiCert SHA2 Secure Server CA & tested certificate.
polonus