Widgets do not display their icons in the left corner and just have an empty placeholder.
One answer
Hi Kryzysztof,
This sounds like a reverse proxy issue, OR a permissions issue, OR just a typo in the directories.
Lots of places to look.
So some questions:
Do previews work?
Do thumbnails work?
Can you load an individual icon via its path in the browser? If the answer to this is no, well, that's your problem. If the answer is yes, are the icons on the same server as the content? Because that's likely a whitelist issue.
Good luck.