For something like this, a screenshot/image won’t work, I would actually need to see the logo uploaded on the site so I can examine/inspect everything together to know where the issue is coming from. If you want to create a temporary user/password, I can login and upload the image and instantly fix it through css. I recommend this so the site won’t show the error until I login and am able to fix it. If you’re able to do so, just leave the logo that you want me to install in the header section (unactivated) and I’ll activate and fix as soon as I see it.