Adobe Campaign Standard: mirror page preview doesn’t work

This article addresses the problem of failed previews when accessing mirror pages via delivery logs due to a product limitation. Limit the number of brandings in the campaign instance.

Description

Environment

Campaign Standard

Issue/Symptoms

When accessing the mirror pages via the delivery logs, the preview of the mirror page fails with the following:

This content is blocked. Contact the site owner to fix the issue.

Resolution

An improvement request has already been logged to address this issue.

Cause
This is a limitation of the product that occurs when a campaign instance has many brandings (> 25). When a campaign instance has more than 25 brandings, code building HTTP Header Content-Security-Policy uses a paginated list of branding limited to 25 entities. Consequently, all branding is not used when building this Header. The occurrence of the error will depend on whether the delivery is linked with a branding that is part of the first 25 returned branding by the security code or not.