@cagatay Let me have a look at your site. Can you give me the URL where this issue is manifesting itself? Feel free to send it in a PM if you do not want to place it here.
EDIT - never mind, I found the link.
From what I see in the console
Failed to load resource: the server responded with a status of 404 ()
OGProxy cannot retrieve the preview image from the source URL, so attempts to replace it with it’s own image called 404_3.webp
. However, this image does not seem to exist in the relative path of /images/404.webp
and so the result is what you see in the screenshot.
To resolve this, download the file 404.webp
from the below link, and place this into your OGProxy subdomain inside the folder of images
https://github.com/phenomlab/ogproxy/tree/main/images