Some people get ERR_CERT_AUTHORITY_INVALID on a custom domain

Getting a few reports of people on Chrome getting

NET::ERR_CERT_AUTHORITY_INVALID

NET::ERR_CERT_AUTHORITY_INVALID

NET::ERR_CERT_AUTHORITY_INVALID

NET::ERR_CERT_AUTHORITY_INVALID when accessing https://charity.cdawgva.gg.

Pages url: https://cdawg-auction.pages.dev
Account ID: 54392aaba81d753fd12c3b659b790ed4