Edit File: wp-defender-secrets.php
<?php // The file is used to generate and validate secret keys. Deleting this file or manually editing the content will permanently break 2fa TOTP method for all users. if ( ! defined( 'WPINC' ) ) { die; } // WP Defender - Start define( 'WP_DEFENDER_TOTP_KEY', 'r2Plxuw4BY17k+UIeySFFRYGLml2RcuLZWIWLMut1R8=' ); // WP Defender - End