Content Builder Mixed content does not warn when HTTP locations exist in Content
Last updated 2021-02-16 ·Reference W-7686577 ·Reported By 0 users
Fixed in version Marketing Cloud Release January 2021
Currently there is nothing within the UI that is designed to warn users when they might run into mixed content issues via content created through Content Builder. See Chrome information here:
1. Create content that has image links that are hosted in HTTP URL locations
2. Note that the link will be broken or the image will not render
Disable mixed content browser settings.