Supposedly they have the Roku app fixed. Here is their email to me today...
"If you have updated your NCHC.tv Roku app in the last 48 hours, our sincerest apologies for the temporary inconvenience.
However, we were able to re-activate the previous version of the app which will allow you to successfully watch NCHC.tv live games.
Please update your Roku app before you watch the next live game.
Thank you for your continued patience and please let us know if you are still encountering issues.