What is causing "Network not available. Default Remote config activated" toast message?

I started getting "Network not available. Default Remote config activated" toast randomly and i wasn't able to find what caused it. Its sure some app was doing it do I installed toast tracking app "Toast Source" from playstore.

It was zee5 app that was causing the toast. 

Toast Source app link is below

https://play.google.com/store/apps/details?id=pl.revanmj.toastsource