While this plugin is active i cant log into my admin account

Hello,

This is the only plugin that actually stops bot registrations on my website but im facing an issue with logging in. I have google authenticator installed on my admin login page (dont know if that changes anything). When this plugin is turned on, after entering my name, password and authenticating i get a message that my credentials are wrong and i have 3 atempts remaining, before i get my ip banned for 20 min by my provider. If i disable your plugin, everything works fine. I can fully log in with CAPTCHA 4WP plugin, but it doesnt stop the bots.

Is there a way to fix this?