Unhandle Exception Has Occurred in NEXT PVR App

Its happening when I click on a channel a second time,first time is ok and it plays channel then stop channel and pick a different one then this happens..

Unhandle Exception Has Occurred in a component in your application.

Object reference not set to an instance of a object..

I have to close Nextpvr app and then restart it,

I am using it on Windows 10,.

It never did this before..??