Hi, it seems like you have tried to rename wp-admin path, and missed something there. Please do these to reset the plugin settings.

1) In “wp_options” table in your database, delete the rows with following “option_name”. Please backup your database first.
– hide_my_wp
– hide_my_wp_undo
– hmwp_ids_installed
– hmw_all_plugins
– external_updates-hide_my_wp
– hmwp_spam_counter
– hmwp_temp_admin_path

2) comment out or remove following line from wp-config.php (if you have added it there previously)
define(“ADMIN_COOKIE_PATH”, “/NEW_WPADMIN_PATH_NAME”);

You shall now be able to login to backend, and can re-configure the plugin. And to change wp-admin path name you’ll need to follow the on-screen instructions very carefully.

Also check these tutorials:

Quick Setup – Video Tutorial

Change wp-admin to something else