When authoring web experiences, if you add content coming from the Adobe Experience Manager Assets Essentials library, you must set up the subdomain that will be used to publish this content.
To help you with subdomain configuration, a detailed documentation has been added to describe how to set up the subdomain that will be used to publish content coming from the Adobe Experience Manager Assets Essentials in your web experiences. Read here to know more: Configure web subdomains
Please feel free to use the below comment section for any questions and/or feedback related to accessibility features in Journey Optimizer.
Sukrity Wadhwa