I bought the X50 to have access to the MAC whitelist - allow list mode.
After the initial setup, when I change Block list mode to Allow list mode, the Wi-Fi access control item disappears from the Security tab. And no Allow list works; any device can connect to the router.

To have the Wi-Fi access control option appear again in the Security tab, I have to restart the device. But after another attempt, the same thing happens again; the tab disappears from the menu, and it goes on like this repeatedly.

I'm really desperate about this