Creality CR-X not recognised by LB

I attached a Creality CR-X (Marlin) but the software does not recognise the printer.
I hear the Cr-X handshake and see waiting for connection in LB.
Than it states Port open waiting for answer.
Executing G1 X10 does not do a thing.

What could be the area to look for?
Firmware on the CR-X: 1.10.0

And is it possible to run Lightburn with or from a PI?

Grts,

SOLVED!

Baud rate :nerd_face:

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