[Defender Pro] mask login not working

Yesterday i had appcontact; the contact was broken. Haven’t heard anything afterthat. I want to change the login from wp-admin to something else. I set it up, and it is not working. Tried something else, cleared cache. Still not working. I granted acces for support. Please let me know. I will activate it now. The login is setup is /123erik for now. the website is kt-e.nl