Google Authenticator Codes are generated and verified using system/server clocks, as such it is absolutely necessary to make sure your server clock is in-sync and accurate.
If you receive an 'Oh snap! Invalid Authentication Code' error when trying to activate 2-Step Authentication under "Security Settings" in LaraPass, its because your server clock in out-of-sync.
Possible Fix: Soft/Hard Reboot of the Server/Webserver does usually fix the issue. If it doesn't, try manually adjusting the server clock and restarting the web-server.
If the issue still persists, open a ticket and our support team members will try to identify and resolve your issue at the earliest.