Looking at the browser’s dev tools…
It looks like your baseURL includes a subdirectory. I suspect you have:
baseURL = 'https://ct1ete.net/new/'
The URL of the image should be:
https://ct1ete.net/new/images/ZA4O4A_QSL.png
See https://discourse.gohugo.io/t/not-able-to-render-images/42948/4