Should I used "http" or "https" for my Base Site URL/iframe parameters?
Always use the secure site "https". You can manually add the "s" to your Base Site URL if it needs updating.
Also make sure these check boxes are ticked on your site as well.

Payments2Us for Salesforce. Manage online payments, donations, events, memberships and peer-to-peer fundraising
Always use the secure site "https". You can manually add the "s" to your Base Site URL if it needs updating.
Also make sure these check boxes are ticked on your site as well.