I had issue connecting to the Channels server thru my Nvidia Shield (it had been working up until now). I tried going to the web interface but I'm stuck on the startup screen. I could not get /admin/troubleshooting to load either, however /log was working. Not sure how to proceed now. Any help?
As @tmm1 mentioned, Channels DVR Server on Nvidia Shield is no longer supported. You will need to migrate your server to another piece of hardware. There are details in the linked post.