Not able to find any element using xPath after toggling the wifi to off

In my application it was require to toggle the wifi using appium. So i took the latest code from git hub and enabled the toggle wifi and airplane mode command which where already there.

After making changes i updated my existing appium dotnet driver dll with this new one and then i started facing problem.

I was able to disconnect wifi but there after none of the element was getting found. It has started throwing Exception “No element could be located using xPath : #######” and inner exception was “Chrome not reachable.”

See the attached image for details.

Can anyone please help me over here is it issue with appium or am i doing something wrong ?

Appium version used : 1.6.4
Chromedriver vesion : 2.28