Hi, can you access the admin page if you rename hide_my_wp plugin folder in /wp-content/plugins/ directory? If you can, then login to wp-admin; rename back hide_my_wp plugin folder to original one; activate HMWP plugin; in HMWP settings start tab click on “reset settings to wp” button and then apply following settings:
– in HMWP start tab, set ‘Medium Privacy – More Compatibility’ scheme and save the settings
– in HMWP permalinks & urls tab, set “rename plugins” option to “all plugins” and save the settings
Note: Assuming that it’s WP single site and Apache server. Your site’s htaccess file should be writeable.