With NetSuite 2018 and later, a two-factor authentication (2FA) is mandatory when authenticating users via developer tools. A user is expected to create a new token, if no token exists, during the fetching and deployment of themes and/or extensions.
The user may see an “Invalid login attempt” error message during this process due incorrect time and/or date on the user’s local computer or device.
To resolve this, ensure the device’s time and date are set correctly to match current time.