Segmentation Fault opencv_highgui3

[Bananenbrot1]

Hi, I tried to run the guidanceNode but I always get a segmentation faul, while probably trying to load the images.

Thread 7 "guidanceNode" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffe27fc700 (LWP 10897)] 0x00007ffff691c4bd in cv::imshow(cv::String const&, cv::_InputArray const&) () from /opt/ros/lunar/lib/libopencv_highgui3.so.3.2

Is it a Problem with OpenCv2, maybe I installed it wrong.