Main logo on the website is 1200X553 (too big I know), but for testing purposes, it is not showing up. I have tried your instructions to others saying: set Link Url = File Url Size : Full Size and then click on “Insert Into Post” button. I have changed my CSS to:
Hi, please crop your logo image to make it square with the built-in image editor in WordPress. Go to your media library and choose your image, then start editing.