If the ad is an entire framed page, not just an image, it's normal for the frame area to show either an error message or alternate content specified by the page.

How does your ad blocker work? If it modifies requests from http://adserver to http://localhost (or another address on your computer), Linux and Windows might be handling that differently.

An Eero device is what does the blocking for me. I guess I will just have to get used to using Windows again. Thank you very much for the quick response. It is what it is. Ubuntu really was better cleaning up the browser with the ad blocks.

I started looking at Eero support and Reddit threads, and it didn't sound like you have much control over what happens when a resource is blocked. That said, you could submit a ticket and see why Windows doesn't fail quietly like Linux and whether there is a workaround.