We have investigated the issue and as of 17th April 2015, it looks like there is a networking issue with the Google causing this issue. Please follow the below steps to resolve the issue :
Goto Settings > Wi-Fi and next to your Wifi Network Name there should be a small blue i inside a circle, on the Right Hand side. Tap the small blue i.
Then for DNS, enter in the value of 188.8.131.52
Then tap the < WIFI at the top of the screen which should Save the changes.
Try using app again and it should work correctly from now on.