Problems with initializing UIDocumentPickerViewController after updating to iOS11 beta 5

After updating to iOS11 beta 5 initializing an UIDocumentPickerViewController:

let documentPicker = UIDocumentPickerViewController(documentTypes: ["public.zip-archive"], in: .import)

shows these messages at runtime:

[DocumentManager] Failed to get the remote browser View Controller with error (Error Domain=NSCocoaErrorDomain Code=4097 "connection from pid 508" UserInfo={NSDebugDescription=connection from pid 508})
[DocumentManager] Failed to get the service proxy object with error Error Domain=NSCocoaErrorDomain Code=4099 "The connection from pid 508 was invalidated." UserInfo={NSDebugDescription=The connection from pid 508 was invalidated.}
[DocumentManager] The view service did terminate with error: Error Domain=_UIViewServiceInterfaceErrorDomain Code=3 "(null)" UserInfo={Message=Service Connection Interrupted}

The app is still running. But when I try to present the documentPicker it ends up with a white screen and a endless loading activityIndicator.