catking build failed when trying to install moveit on kinetic 16.04 (solved)

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Hi! I'm getting a catkin build error when I'm trying to run catkin build. I'm following this tutorial: http://docs.ros.org/kinetic/api/movei...

It gives me this error message:

Errors     << moveit_tutorials:make /home/ubuntu/ws_moveit/logs/moveit_tutorials/build.make.000.log
/home/ubuntu/miniconda3/lib/libpng16.so.16: undefined reference to `inflateValidate@ZLIB_1.2.9'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/ubuntu/ws_moveit/devel/.private/moveit_tutorials/lib/moveit_tutorials/planning_scene_ros_api_tutorial] Error 1
make[1]: *** [doc/planning_scene_ros_api/CMakeFiles/planning_scene_ros_api_tutorial.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
/home/ubuntu/miniconda3/lib/libpng16.so.16: undefined reference to `inflateValidate@ZLIB_1.2.9'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/ubuntu/ws_moveit/devel/.private/moveit_tutorials/lib/moveit_tutorials/motion_planning_pipeline_tutorial] Error 1
make[1]: *** [doc/motion_planning_pipeline/CMakeFiles/motion_planning_pipeline_tutorial.dir/all] Error 2
/home/ubuntu/miniconda3/lib/libpng16.so.16: undefined reference to `inflateValidate@ZLIB_1.2.9'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/ubuntu/ws_moveit/devel/.private/moveit_tutorials/lib/moveit_tutorials/motion_planning_api_tutorial] Error 1
make[1]: *** [doc/motion_planning_api/CMakeFiles/motion_planning_api_tutorial.dir/all] Error 2
make: *** [all] Error 2
cd /home/ubuntu/ws_moveit/build/moveit_tutorials; catkin build --get-env moveit_tutorials | catkin env -si  /usr/bin/make --jobserver-fds=6,7 -j; cd -


Failed     << moveit_tutorials:make                [ Exited with code 2 ]      
Failed    <<< moveit_tutorials                     [ 1 minute and 10.2 seconds ]

I'm new to ROS and I don't have much experience with Linux. Can someone help me please?