"Why does this issue occur?"

[parzi12]

Why am I encountering this error while running YOLOv5 in Docker, and how can I resolve it? please bb

root@1eedc933a7f6:~/catkin_ws/src/yolov5_ros/launch# roslaunch yolov5_ros yolov5.launch
... logging to /root/.ros/log/0fdf95f6-7a15-11ee-8153-0242ac110002/roslaunch-1eedc933a7f6-1525.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://1eedc933a7f6:39731/

SUMMARY

PARAMETERS

• /detect/agnostic_nms: True
• /detect/confidence_threshold: 0.75
• /detect/data: /root/catkin_ws/s...
• /detect/device: 0
• /detect/dnn: True
• /detect/half: False
• /detect/inference_size_h: 480
• /detect/inference_size_w: 640
• /detect/input_image_topic: /image_jpeg/compr...
• /detect/iou_threshold: 0.05
• /detect/line_thickness: 3
• /detect/maximum_detections: 1000
• /detect/output_image_topic: /yolov5/image_out
• /detect/output_topic: /yolov5/detections
• /detect/publish_image: True
• /detect/view_image: True
• /detect/weights: /root/catkin_ws/s...
• /rosdistro: noetic
• /rosversion: 1.16.0

NODES
/
detect (yolov5_ros/detect.py)

ROS_MASTER_URI=http://localhost:11311

process[detect-1]: started with pid [1550]
No protocol specified
qt.qpa.xcb: could not connect to display :1
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/local/lib/python3.8/dist-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

[detect-1] process has died [pid 1550, exit code -6, cmd /root/catkin_ws/devel/lib/yolov5_ros/detect.py __name:=detect __log:=/root/.ros/log/0fdf95f6-7a15-11ee-8153-0242ac110002/detect-1.log].
log file: /root/.ros/log/0fdf95f6-7a15-11ee-8153-0242ac110002/detect-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done