I turned on 2-Step Verification and an app on my phone or computer stopped working
When you turn on 2-Step Verification, any apps that need access to your Google Account will stop working until you enter an App Password in place of your normal password.
Common applications and devices that require an App Password include:
Old versions of email clients such as Outlook, Apple Mail and Thunderbird
The email app that comes with your phone (but is not made by Google)
Some chat, contacts and YouTube clients
You do not need to memorize App Passwords because every App Password is only used once. You can generate a new App Password whenever you’re asked for one--even for a device or application you’ve authorized before.
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That's a 2-step verification issue.
From https://security.google.com/settings/security/apppasswords help:
I turned on 2-Step Verification and an app on my phone or computer stopped working
When you turn on 2-Step Verification, any apps that need access to your Google Account will stop working until you enter an App Password in place of your normal password.
Common applications and devices that require an App Password include:
Old versions of email clients such as Outlook, Apple Mail and Thunderbird
The email app that comes with your phone (but is not made by Google)
Some chat, contacts and YouTube clients
You do not need to memorize App Passwords because every App Password is only used once. You can generate a new App Password whenever you’re asked for one--even for a device or application you’ve authorized before.