According to https://forum.stake.com/topic/30979-error-invalid-2fa/
Issues with 2FA usually happen due to the time not being synced correctly, the time on your device you're logging in and the one where you're receiving the 2FA code must be the same. This is the most common reason for receiving an invalid 2FA code.
Hope this helps.
It's a rare occurrence but easy to resolve even if we face such issues. Here is a guide about hoe to resolve on both andoird and IOS.Issues with 2FA usually happen due to the time not being synced correctly, the time on your device you're logging in and the one where you're receiving the 2FA code must be the same. This is the most common reason for receiving an invalid 2FA code.
Hope this helps.
Quote from: https://support.gatehub.net/hc/en-us/articles/360021168354-Time-Synchronization-for-your-2FA-App
Time Synchronization for your 2FA App
On Android:
Go to the Main Menu on the app.
Select Settings.
Select the Time correction for the 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).
