912UAG-2HPnD - no LTE interface and Port unknown

Hi there!

This morning I decided to try and make my 912UAG-2HPnD a standalone LTE hotspot.
I inserted my SIM card and went to follow the manual to configure the modem. In Winbox, trying to add an interface I have no LTE option.
Also when I try to create a PPP client, the Port section is red and shows “unknown” with no other choice in the drop down menu.

Is there any way I can get it to work? Any cue?

First, you must connect a LTE modem in mPCIe slot.
Like this:

and he can be in PPP or LTE mode what needs different configuration.

Block Diagram is like this (without build-in LTE Modem - you must resign from USB to use mPCIe interface):