MG5050+ locked serial

Hi,

I have an MG5050+ I tried multiple combinations of the configuration and continuously get the following in the logs:

INFO - PAI.paradox.connections.connection - Connection established

INFO - PAI.paradox.paradox - Connecting to Panel

ERROR - PAI.paradox.paradox - Timeout while connecting to panel. Is an other connection active?

ERROR - PAI - Unable to connect to alarm

After some investigation, the MG5050+ serial ports requires to be unlocked, as per the installers manual:

Enter section [300] to unlock your MG5050+ panel serial ports for use with third-party devices using a TM70/ TM50 Touch keypad.

So my questions:

1. Is this expected behaviour/ Is the MG5050+ supported?
2. Anyone else with the issue/ Is there another way to unlock the serial ports?