Net::err_cert_common_name_invalid Error On Email Reset Using Sendgrid

I have a Django site which is hosted on GCP App Engine with SendGrid as email host. When resetting the password and clicking on the link in the following email, the subsequent erro

Solution 1:

Twilio SendGrid developer evangelist here.

You will need to get SSL Click Tracking turned on so that your CDN can forward SSL content onto SendGrid with a valid certificate for your domain.