Google won't let you sign in with very old Android versions after September 27th
 

Are you still holding on to a Nexus One for sentimental reasons? It might be time to move on. Reddit users and 91mobiles have learned that Google will no longer let you sign into the company's apps on devices running Android 2.3.7 (Gingerbread) or lower from September 27th onward. You can still sign in on the web, but you'll have to update to at least the tablet-only Android 3.0 (realistically, Android 4.0) if you want to avoid major hassles while checking Gmail or navigating with Google Maps.

https://www.engadget.com/google-ends...7.html?src=rss