Hi, it seems like you have missed some step while renaming wp-admin path name.
Please do these:
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”);
Now you can re-configure the plugin. Please follow the steps as mentioned here https://support.wpwave.com/videos/change-wp-admin-to-myadmin to rename wp-admin path
Note: If you have already used “panel” keyword for some page/post/category then you cannot use that name. Please choose another name for wp-admin in that case.