Solved Server.headerimage not working on my hosting (CloudFlare)

Hello,
I know there was multiple threads like that, but i cant find solution.
Like all said size should be "512x256" and .png or .jpg. Then i set it:

server.headerimage "http://boberworld.pl/img/rust/boberworld.png"
server.url "http://boberworld.pl/"
server.description "Text"

Everything is displaying, but not server.headerimage i tried to use rcon server.headerimage, but nothing happens. What i did bad?

 

I uploaded on imgur and it works, but can tell me anyone why its not displaying when its on my hosting?

 

here you go

Code:

https://i.imgur.com/nw8Lul0.png

 

Yes I know that is why I gave him a working link