DAY 2 FOLLOW UP
I just checked with the team. They have reached out to sendgrid multiple times and we are waiting for a resolution on their end.
The workaround to this is to set up your own email API key (from Sendgrid, postmark, etc) and set it up for your app:
https://manual.bubble.io/help-guides/getting-started/navigating-the-bubble-editor/tabs-and-sections/settings-tab/application-settings/email#setting-up-sendgrid
And as always, please connect with support if you run into any issues