Cam problem in Chat

Hi Everyone,

I am having difficulties with the cam functionality in chat. For example, if I click on the video icon of someone who has their cam on, it opens a small popup for the cam, but it never loads. It just displays as a black box. It is also not possible to close the item either without leaving the chat completely.

I have TN runnig via Firefox.

Any ideas how to fix this? Thanks for your feedback.