After some fantastic support by @deblan on a Custom Menu issue, I now have the following situation.
I want to have a custom header image, and I also want to have Custom Menu enabled and working. It appears it’s not possible to have both.
I run NC 19.0.4 via snap, on Ubuntu 20.04. Latest versions of Custom Menu and Theming.
I normally have Theming disabled, apparently this also makes Custom Menu not work. In this setup, I have edited the ‘example’ theme and I have a custom header image which works fine.
If I enable Theming, Custom Menu also starts working, but there seems to be no way to have a custom header image. I tried using Custom CSS, but the CSS I enter is not being picked up. I then found and edited the server.scss file, and replaced the background-image code there with my custom image. Firefox console complains that it “can’t load image”, and the image never shows.
If I leave the original server.scss intact, the random header image feature also doesn’t work - I can only change the colour of the header but it never shows any images.
If anyone can shed light on why this may be happening, I’d highly appreciate it.