Hey Irwin,
May i know how you populate this pop up? Is it click on the `feature option` from the post pen icon?
If yes, the reason why you hitting that warning icon is because that logged in user do not have moderation permission.
By default this `feature post` option is only for the moderator and Superadmin, if not all of your subscriber will have permission to feature or unfeature all of your current post.
To fix this, you can check on your subscriber is under which user group, once you know it, then access your
backend > Easyblog > ACL > select your user group > moderation tab > Feature Blog Post - NO
Hope this helps.