My featured images and videos aren't showing. I have just applied The Fox theme to a site that was previously using a different theme. How can I get the featured images and videos to show in the post headers?
Make sure the following option is not selected i.e. appearance \ customize - single - hide featured image on single post.
If that checks out and you are still experiencing the issue then respond with temporary admin access - username password with admin privileges and we will take a deeper look at this from the backend.