ERROR1 :
`CMake Error at /opt/ros/melodic/share/cv_bridge/cmake/cv_bridgeConfig.cmake:113 (message):
Project ‘cv_bridge’ specifies ‘/usr/include/opencv’ as an include dir,
which is not found. It does neither exist as an absolute directory nor in
‘${{prefix}}//usr/include/opencv’. Check the issue tracker
‘https://github.com/ros-perception/vision_opencv/issues’ and consider
creating a ticket if the problem has not been reported yet.
Call Stack (most recent call first):
/opt/ros/melodic/share/catkin/cmake/catkinConfig.cmake:76 (find_package)
yolov4-for-darknet_ros/darknet_ros/darknet_ros/CMakeLists.txt:52 (find_package)

– Configuring incomplete, errors occurred!
See also “/home/nvidia-yolov4/workspace/build/CMakeFiles/CMakeOutput.log”.
See also “/home/nvidia-yolov4/workspace/build/CMakeFiles/CMakeError.log”.
Makefile:2406: recipe for target ‘cmake_check_build_system’ failed
make: *** [cmake_check_build_system] Error 1
`

**ERROR2
** OpenCV_INCLUDE_DIRS

ERROR3