@Tgr thanks for the quick reply!
Here are some more details about this issue, could you help take a look to see if you have any clue.
I am working on the MediaWiki version 1.26.2 and download MultimediaViewer at version 0.3.0.
I did set up the img_auth.php to protect the access to media files. As long as user logged in, user could view the media file without problem. For example: http://dev.example.com/wiki/img_auth.php/6/69/Denmark.png. But when logged in user try to view the same image on MultimediaViewer, we got this massage:
There seems to be a technical issue. You can retry or report the issue if it persists. Error: could not load image from http://dev.example.com/wiki/img_auth.php/6/69/Denmark.png
And I could see failed to load resource error on Chrome console:
Failed to load resource: the server responded with a status of 403 (Forbidden)
It might have something to do with my Ngnix's configuration. I will double check...
Is there any configuration on MultimediaViewer related to this?
If you still think it is a issue, I will file a bug for it.
thanks a lot,