Question Issue for certain apps connecting to wifi in nexus 5

I'm facing one particular issue. I had used noroot firewall in my nexus 5 unrooted device to limit data access. However, recently, google applications like gmail,youtube,play store etc was not able to access my wifi (showing connection failed) whereas it can access data connection. However, using Chrome i can access wifi connection successfully, so I believe its not a hardware issue. Same is the case with google now, it doesn't work using wifi, but works in mobile data. I believe its because of some setting change caused by noroot firewall. Please help.