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The launch file you are using is in the "test" folder, and does not appear to be up to date. It looks like its using the old rosbag commands for playing test data. If you want to use that test data, you should use something like this

<node pkg="rosbag" type="rosplay" name="rosplay" args="-r 0.5 -b 100 $(find door_handle_detector)/test/door_closed_daniel.bag"/>

However, if you want a live door detection, try one of the launch files from the launch directory, like door_hand_detector_vision.xml