Can't launch kinect2_tracker

[Sawsie]

Hi,

I want to use kinect2_tracker for skeleton tracking with kinect v2.
I have installed libfreenect2 and iai_kinect2 - and kinect works fine.

I followed the Readme for setting kinect2_tracker but when I launch the tracker I get the error:
[tracker.launch] is neither a launch file in package [kinect2_tracker] nor is [kinect2_tracker] a launch file name.

I see there is a problem - I'm not able to catkin_make. There are a lot of errors:
Error catkin_make kinect2_tracker.pdf

Did I forget something?
Any help?