Impossible to see stream video from ImageViewer app

We’ve 3 NVR linked with the same NVR Milestone, we can see all the TLC of NVR1 and NVR 2 but not of the NVR3: We receive error of connection. The NVR1 is the Management server for all 3 NVR and the other the other two act as a recording server. How can I troubleshoot it? Could you help us?

If you see the same issue using the regular Smart Client, it is better to ask in the Support Community, you should get better help from the partners using the support community. https://supportcommunity.milestonesys.com

we used image viewr to integrate streaming on our application

Please check if you see the same issue using the regular Smart Client.