420-TLS certificate verification error
420-TLS certificate verification error 0xX while downloading from Y.
Invalid or missing certificate for the TLS server.
Verify that there is a valid certificate for the TLS server installed, and review all TLS settings.
For more information, see the UEFI System Utilities user guide for your product on the Hewlett Packard Enterprise website (https://www.hpe.com/info/uefi/docs).