I have made a signature to advertise my competition. I added it to the Change Signature Page, The page updates perfectly and shows me what the signature should look like

but when I go on to the forums and post on one The picture doesn't show up but the link does:

I used this code with Square Brackets instead of Round as the image above shows.

(url=https://subeta.net/forums.php/read/931579)(img)https://i.ibb.co/6Nfy8JC/Untitled.png(/img)(/url)

The image itself is 468x88px so it's small enough to go onto the signature at 450 pixels wide, and 325 pixels in height max. it says my current signature is 20 pixels tall.

it even works as a billboard

I sent the link to another member with the picture and that works too.

What can I do?