Normally when encountering an issue with a standalone Channel/app like the BlazeTV, it is often recommended to see if available on other Channels/apps like Pluto or the Roku Channel.
Sometimes these Channels/apps just experience issues and need to be addressed by their developers. Usually either contact the Channel developer, or wait a few days to see if resolved.
Really the only thing an end user can do to see if they can resolve issue is to Remove Channel, Restart the Roku device to clear cache, and then Reinstall Channel (in that order).
If doesn't resolve issue, then it is an issue that usually needs to addressed by the Channel developer.
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