To reproduce this bug:
1) Start a tracking device using pluigin org.mitk.gui.qt.igttracking, so that microservice is available (can be a virtual tracker as dummy)
2) Start an ultrasound device using plugin org.mitk.gui.qt.ultrasound, so that microservice is available (can be a webcam as dummy)
3) Start view "MITK USTrackingNavigation Calibration"
4) "+" to create a new combined modality selecting the two devices started above
5) Either click the green check to activate the device or click "Start Calibration for Selected Device" => Crash
Was tested with the 2022.10 release, build configuration mitkNavigationModules (Windows 10, VS2019).