If your css file contains:
@import url("https://cdn.jsdelivr.net/npm/[email protected]/app/assets/builds/blacklight.css");
Then you will see this request in the console:
GET
https://cdn.jsdelivr.net/npm/[email protected]/app/assets/builds/blacklight/logo.png
[HTTP/2 404 17ms]
This can be worked around by adding this CSS variable override:
:root {
--bl-logo-image: url("https://cdn.jsdelivr.net/npm/[email protected]/app/assets/images/blacklight/logo.png");
}