Error 403 Forbidden when use AIO WP security plugin

Hi,

I am using All In One WP Security & Firewall together with Themencode PDF Viewer. But when AIO WP Security & Firewall is enabled, then admin link https://*********.sk/wp-admin/admin.php?page=themencode-pdf-viewer-addons is causing

Error 403:
Forbidden
You don’t have permission to access /wp-admin/admin.php on this server.

When All In One WP Security & Firewall plugin is disabled, then all working perfectly