Advanced Security blocking my company's internal-only website

The URL is https://cloud.googleprod.com/, but there are many others under *.googleprod.com (they all require company authentication to proceed).

It is being used by many employees of Google, which is utmost critical during the covid-19 shelter-in-place directives.

The URL fails for Comcast xFi Advanced Security users with a cryptic ERR_SSL_PROTOCOL_ERROR; it works if I/others disable Advanced Security temporarily.

Would it be possible to have engineering investigate this error and whitelist this domain in Advance Security?

@ComcastRachelH - would appreciate your help -- you seemed to help resolve a similar issue before.