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Since updating to Xcode 10, my WatchKit app is broken.Every time I try to start the app I get the following error message:-[SPRemoteInterface createViewController:className:properties:contextID:info:gestureDescriptions:clientIdentifier:]:2909: Couldn't instantiate class _TtC32WatchKit_App_Extension19InterfaceController2018-10-01 21:51:41.579080+0200 WatchKit App Extension[2457:27053] [default] -[SPRemoteInterface createViewController:className:properties:contextID:info:gestureDescriptions:clientIdentifier:]:2910: Critical failure. Simulating crash: Condition failed:"NO". Couldn't instantiate class _TtC32WatchKit_App_Extension19InterfaceController(lldb)The viewcontroller is the initial viewcontroller set in the Storyboard file and the all targets, modules etc. are set correctly in the Storyboard and in the Inspector as far as I can tell.I created a new project with the same WatchKit Extension setup and I can start that app - it's just a problem with my existing project, where I've added an app extension.Also tried to delete the app extension and add a completely new one to my iOS project, but with no success.Does anyone have any suggestions on how to get this to work?