Thanks for posting here in the Community.
Verify that the proper account with the subscription is signed in and linked to the channel.
In some cases, removing the channel and then re-installing it may help. To ensure the process is successful, follow the steps below making sure you restart your Roku device before adding the channel again.
-Remove the channel: Highlight the channel tile on your home screen and press the Star button to open the options menu. Select Remove channel and confirm.
-Restart your Roku device: Restart the device from the settings menu. Go to Settings > System > System restart > Restart.
-Re-install the channel: After your Roku device restarts, visit the Roku Channel Store and add the channel again.
-If channel requires a login, you may need to log in anew.
Let us know if this works for you!