404 error on admin login page

I enabled the plugin wp login change this morning on ceacichaquatics.org

Than changed the wp-login to /?administrator

Now when I go to ceacichaquatics.org/?administrator or ceacichaquatics.org/wp-login both forward me to my home page. All my other links are now broken with a 404 error on each page.

I’ve read I need to rename the htaaccess file, however I do not seem to have this file.

https://www.ads-software.com/plugins/custom-login-url/