Account verwerken mislukt.: Verificatie mislukt. Controleer de gebruikersnaam en het wachtwoord. "Invalid credentials (Failure) (NO)."
Username and password ard OK, but it doesnt work anymore. Version 5.3.5.
It seems like there might be an issue with the verification of the account. Have you tried logging in to your Gmail account on a web browser to ensure that your username and password are correct? You may also want to try updating to the latest version of Gmail Notifier Pro or contacting their customer support for further assistance.