Check that the code is entered correctly: Make sure that the code from the application is entered correctly, there are no typos or spaces when entering the code, and it has not expired.

Carefully check the e-mail you specified when registering, you will receive an e-mail with a confirmation code, which must be entered along with the code by the application generator. The letter with the code can get into Spam, so do not forget to look for it there as well. Please note, due to the peculiarities of the system of providing postal confirmation codes, the letter may arrive with a delay of 5-10 minutes.

Check the time on your device: Make sure the time on your device where you enter the code is synchronized with the current time in your time zone on both devices. A time mismatch can cause authentication issues as it is used in the code generation process. Note, if you have 2 different time zones set on your device, it is worth trying to get them to the same value, as this can also cause problems with the authenticator working.

Check your internet connection: Make sure you have a stable internet connection. Internet problems can cause the authentication code to be sent or received incorrectly. If there is an option to change the network source for one or all devices, be sure to try doing so. Often the error is caused by problems on the ISP side, especially when using a mobile network.

Update your authentication app: Check for available updates for the app you use for two-factor authentication. Installing the latest version may help resolve issues related to authentication performance.