Get the error 78754 despite the recent change of password and the correct settings

My address book has been hijacked. Cleared virus, reloaded Tbird. Changed password. Gmail account now accessible online. But Tbird does not accept the new password, which is saved correctly. I have other addresses that are accessible and download in Tbird. All the settings are correct for all accounts.
Why Tbird rejects always download 78754 error message

If you access your gmail account using different devices such as telephone, computer, computer laptop etc, then you might to establish a 'two step checking' for devices.
If you choose "Two-step Verification", then you will need to generate "an application specific password ' to use Thunderbird.

If you use Thunderbird on your computer to access e-mail, then you can choose the option "less secure apps.

However...
Thunderbird now includes the ability to use for "Authentication method" OAuth2 incoming and smtp out, if you can try to set this option in the account settings.

Tags: Thunderbird

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