Seeeduino Lotus + NB-IoT Shield not working

I bought a Seeeduino Lotus and a Dragino NB-IoT Shield-B8 but I can not get it to work

I have connected the Dragino shield on top of the Seeeduino (as it should(?))

I follow this tutorial: <LINK_TEXT text=“ … o_Mega2560”></LINK_TEXT>

I tried the part where you could connect the TX/RX of the lotus to the shield’s RX/TX but it does not work

I connected a USB UART to the debug pins of the shield

Tried putting a 2A charger to the seeeduino and seeing what it does in the serial monitor via the RX/TX but nothing changes so it is probably not a power issue

I am getting this in the arduino serial monitor when I reset the shield, so it does do something

</s>úBÿSLÆüÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ REBOOT_CAUSE_SECURITY_RESET_UNKNOWN Neul OK<e>
And this in the putty (debug on the shield) when I reset it:

The “AT” etc. commands return nothing, does anyone know where I am going wrong?