Failed to process package 'mini_ros'

[kennydedavion]

Install the project...
-- Install configuration: "Release"
-- Installing: /opt/ros/melodic/_setup_util.py
-- Installing: /opt/ros/melodic/env.sh
-- Installing: /opt/ros/melodic/setup.bash
-- Installing: /opt/ros/melodic/local_setup.bash
-- Installing: /opt/ros/melodic/setup.sh
-- Installing: /opt/ros/melodic/local_setup.sh
-- Installing: /opt/ros/melodic/setup.zsh
-- Installing: /opt/ros/melodic/local_setup.zsh
-- Installing: /opt/ros/melodic/.rosinstall

• cd /home/pi/ros_catkin_ws/src/spot_mini_mini/mini_ros

• mkdir -p /opt/ros/melodic/lib/python2.7/dist-packages

• /usr/bin/env PYTHONPATH=/opt/ros/melodic/lib/python2.7/dist-packages:/home/pi/ros_catkin_ws/build_isolated/mini_ros/lib/python2.7/dist-packages:/opt/ros/melodic/lib/python2.7/dist-packages CATKIN_BINARY_DIR=/home/pi/ros_catkin_ws/build_isolated/mini_ros /usr/bin/python2 /home/pi/ros_catkin_ws/src/spot_mini_mini/mini_ros/setup.py build --build-base /home/pi/ros_catkin_ws/build_isolated/mini_ros install --root=/ --install-layout=deb --prefix=/opt/ros/melodic --install-scripts=/opt/ros/melodic/bin
  running build
  running build_py
  error: package directory 'mini_bullet' does not exist
  CMake Error at catkin_generated/safe_execute_install.cmake:4 (message):

  execute_process(/home/pi/ros_catkin_ws/build_isolated/mini_ros/catkin_generated/python_distutils_install.sh)
  returned error code
  Call Stack (most recent call first):
  cmake_install.cmake:137 (include)

make: *** [Makefile:83: install] Chyba 1
<== Failed to process package 'mini_ros':
Command '['/opt/ros/melodic/env.sh', 'make', 'install']' returned non-zero exit status 2.

Reproduce this error by running:
==> cd /home/pi/ros_catkin_ws/build_isolated/mini_ros && /opt/ros/melodic/env.sh make install

Command failed, exiting.

Hi, can someone please help me?
there is a lot of "mini_bullet" on the github, but none refer here. who is the one I need to download to make it work?