This issue is caused by using non-default material design for the page, like "Visual="Material".
Unfortunately, the Material Design UI system is not supported by the Scandit SDK.
For this reason, the default design for our `DataCaptureView` component should be explicitly specified, e.g.:
var dataCaptureView = new DataCaptureView {
DataCaptureContext = captureContext,
Visual = VisualMarker.Default
};