Can not edit/create campaign after mapping domain with SSL

Recently we did domain mapping on one of subsite. We are using eNewsletter plugin for newsletters, since remapping we are unable to view our newsletter templates in edit mode (customizer).

We are getting following error in console.

Refused to display ‘…47dad4f42b1&customize_theme=Minimise&customize_messenger_channel=preview-0’ in a frame because an ancestor violates the following Content Security Policy directive: “frame-ancestors”.