Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
Are you using the correct Hallmark Channel/app on the Roku device? There are a few different ones available. (Additionally, I believe the Hallmark Channel that has live tv is "cable/tv provider required" (Hallmark TV) unless you use one of the cable alternative Channels like Frndly or Youtube TV). I believe you should probably be using Hallmark Movies Now.
If you are sure you are using correct Hallmark Channel/app and worked previously, you will probably have to contact Hallmark directly regarding their Channel/app.
Since you are using Hallmark App on your phone, sounds like you subscribe directly to Hallmark. In that case verify you are not trying to sign-in to the "Hallmark Channel on Roku" as this is a different subscription.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660x, Premiere+ 3921, Express 4k+ 3941