Board Thread:Support Requests - Getting Technical/@comment-37993906-20190119024447

On https://yoshi-fanon.fandom.com/wiki/Yoshi_Fanon_Wiki I made the background light green and put yoshi on it but too me it's not appearing but I am 100% it's there becouse the theme customizer says that the picture I put on the background is there and I can see it on the example below but I the actual wiki I cannot see the picture I put as the background

Is it only visible on computer or somthing? 