Have you tried the old delete app and reinstall it?
It could be the beginning of the end for the black box.
To be fair I don’t think Now TV should be providing any devices for their product, they should be focusing purely on getting the app on as many devices as possible. They should also be making sure the app is the same across all big screen devices like Sony Android TV and Apple TV
Ah right didn’t realise it was on a Now TV device.
Best option would be to set it back to factory settings
To carry out a factory reset on your NOW TV Box, Smart Box or Smart Stick:
Using your NOW TV remote, go to Settings, then select System.
Select Advanced system settings, and then Factory reset.
Enter the 4-digit code shown using the onscreen keypad.
Or follow steps for the “hard reset” by pressing a pin in the RESET hole (shown below) and hold down for 30 seconds.