Featured images do not display caption. We use images from other sources that requires us to provide link to the source. We want to have captions for featured images with text and link to the source being displayed under featured image.
Solution:
It is possible with Toolset Image block of Toolset Blocks plugin.
The problem here is that the user is having issues with their site key not validating.
Solution:
It's quite possible here that the URL format is incorrect. The best way to get the site to register correctly is for our plugin to send the correct url to our Registration service.