You probably need to reregister, as the TV may have a new identity now,
if if this is not it, though, try a Factory Reset,
(Something I normally hate to advise, as it is the technological equivalent of ECT shock therapy, but it is often the thing that works, and the only thing that works, with these Sony Android TVs)
YouView Superuser, but not an employee of YouView, nor retained by them for this purpose. It's purely me speaking
