I can't configure the home automation devices in the By-me control unit, I get the error message that says to configure at least one line coupler, why?

During the initialization phase, the control unit is set with the address Area 00 and Line 00. If the SAI burglar alarm is present, then you need to connect a line coupler between the 01845 SAI burglar alarm BUS (which is connected to the control unit) and the BUS where the home automation devices are connected (connect the SAI to the BUS 1 terminal and home automation to BUS 2). In the event that the SAI burglar alarm is not installed, then it is sufficient to reset the control unit from the Configuration/Reset Management menu, and set at least the Area address to something other than "00" when the control unit requests it.