Connect Bslbatt to Cerbo GX

I am trying to connect a NORTHBATT BSLBATT 25.6V LFP 5.12kWh - Lithium battery to Cerbo GX via BMS CAN using a type B victron cable. I have tried both with and without the blue terminator but Cerbo will not recognise the battery. I checked the direction of the cable, bought a second cable, with no success.
Any ideas what might have gone wrong

If not listed here you might have problems unless someone else has this working and can post here.