Question panasonic viera tv apps disappeared

Jul 19, 2019
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Hi

I have a Panasonic viera smart tv (its a 2013/14 version I think)

Ive always used the apps but mainly the you tube app. However tonight I have gone onto the apps and
they have all mostly disappeared!

There's about half the apps that there used to be, and the others are just blank boxes.

My main gripe is that you tube has gone!?