Analytics on Multisite

When I look at the first test with e-newsletter plugin, the header image is not working. If I take the link from the header image then it shows "Site Not registered":

https://698169.smushcdn.com/0/wp-content/uploads/sites/3/2018/12/One-Yoga-Web-Square-Advert.png?lossy=1&strip=1&webp=1

So I am guessing I haven't done something in Smush Pro.