Error message

• Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in rename_admin_paths_url_outbound_alter() (line 65 of /home/ugedu/public_html/sites/all/modules/2.3 - rename_admin_paths/rename_admin_paths.module).
• Deprecated function: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in rename_admin_paths_url_outbound_alter() (line 83 of /home/ugedu/public_html/sites/all/modules/2.3 - rename_admin_paths/rename_admin_paths.module).