kinect camera issue

[yiorgosk]

Hello i want to use hector_quadrotor in order to perform slam with kinect camera but when i summon the drone with the kinect camera on i get this issue:

... logging to /home/balkan/.ros/log/467f3498-8ffd-11e8-861b-2c4d54d42d24/roslaunch-balkan-balkan-13162.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

xacro: Traditional processing is deprecated. Switch to --inorder processing!
To check for compatibility of your document, use option --check-order.
For more infos, see http://wiki.ros.org/xacro#Processing_Order
redefining global property: pi
when processing file: /home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_description/urdf/quadrotor_with_kinect.gazebo.xacro
unknown macro name: xacro:inertial_sphere None None
when instantiating macro: kinect_camera_model (/home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_description/urdf/quadrotor_with_kinect.gazebo.xacro)
instantiated from: kinect_camera (/home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_description/urdf/quadrotor_with_kinect.gazebo.xacro)
in file: /home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_description/urdf/quadrotor_with_kinect.gazebo.xacro
while processing /home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_gazebo/launch/spawn_quadrotor_with_kinect.launch:
while processing /home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_gazebo/launch/spawn_quadrotor.launch:
Invalid tag: Cannot load command parameter [robot_description]: command [/opt/ros/kinetic/lib/xacro/xacro '/home/balkan/husky_kinetic/src/src/hector_quadrotor/hector_quadrotor_description/urdf/quadrotor_with_kinect.gazebo.xacro' base_link_frame:=/base_link world_frame:=/world] returned with code [2].

Param xml is
The traceback for the exception was written to the log file

I have done research and i came to the conclusion that
unknown macro name: xacro:inertial_sphere None None
inertial sphere is missing from my xacro files. I do not know what is wrong.