Whitney83-
(Edit: that's no different than what I remember.)
That means your pre-paid subscription has been canceled and will no longer automatically renew at the end of your prepaid period. You now can remove the channel app to allow you to re-intall it if you wish to continue with it.
While installed (or re-installed) you will continue to have access until the end of your current pre-paid period. You can always resubscribe to extend your subscription.
I believe you can resubscribe through Roku and it would merely re-enable the auto-renewal when your currrent pre-paid period ends without establishing a second concurrent subscription, although I'm not 100% sure of that. Personally, I'd wait for it to expire than resubscribe either through Roku, or directly with the channel.