So how do I fix Package file is invalid error on Google Play Store?
Solution 1: Quite the Play store - open it again and try downloading the app again.
Solution 2: Log in and out of your Google Play Store Account
Solution 3: Clear Data and Clear Cache
Go to Settings --> Applications --> Manage Apps --> Click on Google Play Store --> Clear Data and Clear Cache
Solution 4: Alternatively you can also uninstall play store updates
Go to Settings --> Applications --> Manage Apps --> Click on Google Play Store --> Uninstall Updates
Let us know if youve encountered this problem and found another solution to fix it.