How to remove Alert Authentication require

Hi,

Are you using any security plugin like All In One WP Security & Firewall?

If yes, have you entered any secret key while configuring firewall in AIOWPS plugin?

Please refer following guidelines to configure All In One WP Security Plugin and restoring your htaccess file back to the original if this plugin has created any changes:

https://www.tipsandtricks-hq.com/how-to-restore-the-htaccess-file-when-using-the-all-in-one-wp-security-plugin-5945

https://www.tipsandtricks-hq.com/all-in-one-wp-security-plugin-cookie-based-brute-force-login-attack-prevention-feature-5994

Thanks,