I've installed Oxygen and added the 'Featured' images at the top using the instructions here:
I created a new post, and the featured image shows on the homepage, but when I click on the image on the homepage I get a 404 error and can't view the post content. Same thing happens when I try to preview the post at the backend.
Any help would be greatly appreciated! I'm sorry I can't provide a link, the site's currently in development.