Email validation failure for "firstname.lastname@example.org" on https://offers.hubspot.com/
As a new HubSpot user for a brand-new startup, I've reading a lot of the how-to content available. However I can't (easily) download many of the examples because hubspot doesn't think my email is valid. This happens on multiple "Download Now" calls to action buttons.
Enter valid First, Last names ("Shane" and "Curcuru")
Enter my email address: "email@example.com"
Press "Download Now" (or tab out of the field to force validation
BUG: it reports the email is invalid, and suggests I might have meant "firstname.lastname@example.org"
This consistently fails with the above email address, which is a Google Workplace alias provided for my actual Google Workplace email address. Using a well-known provider's alias like this should be valid; also using .buzz TLD should be valid.