[Can't Edit Banner Settings]

Hello,

 

I'm pretty new to this tool and I have a little bug that I can't understand.

I can create zone, sites, campaign and modify them without any problem.

But when I create a banner, I can't edit it.

If I click the link, the site redirect me to a sigle pixel image. In my navigator tab, I can see "banner-edit.php (Image GIF, 1 x 1 pixel)"

 

I don't understand why this happens.

Thanks for your help