Hi everyone I have just started my Moodlecloud platform and I wanted to change the background picture in the theme and it doesn't work. I tried different sizes and formats, I tried Boost and Classic... what I notice is that it's a 3.10 version, I have another platform in 3.9 and it works fine. I precise that I don't know CSS and I would simply like to modify the background.
Thank you for your help!