For anyone reading this and looking for help with a similar problem:
Roku TVs have a store/demo mode that can be selected during initial set up. There is no provision in the user interface to change this later. To get out of store mode you have to do a factory reset (Settings > System > Advanced system settings > Factory reset) and set up again from scratch. When asked, select home use instead of store/demo.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X