Multiplus II GX not recognized as device

I have setup a new Multiplus II 48/5000 (veconfig).
In Remote Console the Mutliplus is not listed under devices.
Firmware is v3.64
In the past I remember a similair issue that I have solved by doing a VE.bus scan. But in the new console I cannot a find a menu point for it.

Ve bus re-detect is in devices/ multiplus/advanced.

More detail required of how system is connected / communicating / what’s in the system.

On new console, tap screen / settings / devices or tap inverter box / advanced / re-detect

Unfortunately the menu entries are not available.
In the new console I cannot see anything in devices.

I do have a brandnew Multiplus II GX out of the box, configured with MK3-USB interface for the basic settings.

As in the menus I do not see the Multiplus neither VeBus I have done a VeBus rescan in VenusOS:
dbus-send --system /VeBus com.victronenergy.BusItem.Rescan

Running dbus-spy I cannot see a service for the VeBus:

Carefully pop the cover and make sure the GX and the inverter are connected.

Something might be loose.

As these is a brandnew device I will wait for an answer of my reseller before opening the device, to not loose warranty.

I have now opened the case and checked the RJ45 cable connecting the GX board to the Multiplus.
The plug was not inserted correctly in the socket.
These solves my problem.