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This means your admin account is disabled, so you can unlock it via command line:
php bin/magento admin:user:unlock ADMINUSERNAME
We may have forgotten the admin passwords, how to reset it? Here I share 2 useful methods:
Method A: Rest the admin password via PHPMyAdmin:
UPDATE admin_user SET password = CONCAT(SHA2('xxxxxxxYourNewPassword', 256), ':xxxxxxx:1') WHERE username = 'admin';
The xxxxxxx character sequence is a cryptographic salt, it is saved in app\etc\env.php file
[ 'frontName' => 'admin_glasses' ], 'queue' => [ 'consumers_wait_for_messages' => 1 ], 'crypt' => [ 'key' => 'howtobuycheapglassesonline' //cryptographic salt ],
Method B: Create a new admin account via command line, and use the new admin account to reset the old admin account password.