The most common cause for "Incorrect Code" errors is that the time on your Google Authenticator app is not synced correctly. To make sure that you have the correct time in your Google Authenticator app follow the instructions for your operating system below -
On Android:
Go to the Main Menu on the Google Authenticator app
Select Settings
Select Time correction for codes
Select Sync now
On iOS (Apple iPhone):
Go to the iPhone Settings App. (your phone settings area)
Select General
Select Date & Time
Enable Set Automatically
If it's already enabled, disable it, wait a few seconds and re enable
If the issue persists, please refer here.