The right button is inoperative after updating my Note 4 to Lollipop 5.01, how can I fix it?

[AC Question]

The right button is innpoerative after updating Note 4 to Lollipop 5.01

Pressing on the right button fails to bring up the column of apps on the right used for multi-tasking

 

[B. Diddy]

Re: The right button is innpoerative after updating Note 4 to Lollipop 5.01

Welcome to Android Central! Does anything happen at all?