Is this on the main menu?
Is the Vero 4K very far away?
Are you running intense tasks on the device, or scraping a library in the background for instance?
You could also try re-pairing the remote:
- Remove the USB from Vero 4K
- Hold Home and OK button for 5 seconds or so, then the blue LED will keep flashing.
- Plug in the USB receiver and the LED should flash 3 times after 5 seconds, indicating successful pairing.
- Power off Vero 4K for 2 minutes. Turn it back on. The remote should now work