Cubase and Blackmagic Multidock 2

Hi,
Since attaching a new Blackmagic Multidock Thunderbolt 2 to my iMac (3,4 GHz Intel Core i7), Cubase is crashing at startup. I trashed the preferences, did a complete uninstall of the sequencer and re-install, but it always crashes.
Could it be an incompatibility with the hardware ?
Best,
André