@july_1527
The Viki channel occassionally has issues like this. Currently, looks like some "Popular" category content (on air) is playing, but not other on-demand.
You can go to Viki's Help page and on top right there is a "Submit a Request" link that will allow you to file a issue report. (https://support.viki.com/hc/en-us). One of the dropdowns will allow you to specify issues experienced on your Roku device.
The channel developer (Viki) is responsible for the channel maintenance so all fixes will come from them.
It does look like the content is playing correctly on their website though, so may have to try playing there and then cast to your Roku device or TV. Alternatively, stream from a laptop and connect directly via HDMI to your TV. (https://www.viki.com/)
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
