What gameplay feature is this bug affecting?
Clans

What's the issue? Please include any error messages you receive and as much detail as possible.
I am trying to update my Clan's banner to a new one but I keep getting the message that the image cannot be found & I keep getting reverted to the default banner. It's the proper size (150x80) and format & I've tried using a few different image hosting sites but I continue receiving the same message.

When I tried just putting the old banner back, I received the same message & again, was reverted to the default banner.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
This is the Clan it's happening to - https://www.lioden.com/clan.php?id=5720

Any screenshots you can provide us with?
https://i.postimg.cc/kXs2r4Qr/Screenshot-2024-09-22-232005.png

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
- Go to update the Den banner.
- Input the new banner link.
- Hit save.