I want to use icon_image linux40.png
But I only get 404.
If I try to enter the URL direkt, I also get an 404. I have no idea what is wrong.
If I try it on your demo all works fine:
https://demo.thruk.org/demo/logos/linux40.png -> OK
But not on my system:
https://.../main/logos/linux40.png -> 404
Version: OMD 3.00-labs-edition