Error! [darknet_ros-1] process has died [pid 31789, exit code -11

Package:

darknet_ros

GitHub - leggedrobotics/darknet_ros: YOLO ROS: Real-Time Object Detection for ROS

Error:

[darknet_ros-1] process has died [pid 31789, exit code -11, cmd /home/ecb/catkin_ws/devel/lib/darknet_ros/darknet_ros camera/rgb/image_raw:=camera/rgb/image_raw __name:=darknet_ros __log:=/home/ecb/.ros/log/d366a8d4-e518-11ee-b34d-b38592e7db45/darknet_ros-1.log].

Environment:

OS: Ubuntu 20.04
ROS: Noetic

Solution:

I installed OpenCV of 4.5.1 from source instead of the version 4.5.4.
The version of OpenCV was very important for my environment.

OpenCV: 

4.5.1 worked. 

4.5.2 worked.

4.5.4 didn't work.