You can try either:

• enable uBlock Origin annoyance lists, they are more comprehensive than just blocking the popup manually, I use them and haven’t seen this kind of popups in a long time
• your browser reader mode
• an archived version of the page
• If you really want to read this and none of the above works you can try to open the inspector and find the element that has an overflow: hidden property and remove that property, but that’s way more involved

Usually they’re just adding the overflow: hidden css property to whatever container the article is in, which you can just remove from your browser’s debugger