Loading Image list error: cap_gstreamer.cpp (873), (616) & cap.cpp (164) & cap_images.cpp (253)

I uploaded a new issue to OpenCV.

Anyway, I would like to copy my problem here as well.

Hi, all.

I am using OpenCV 4.5.4 on Ubuntu 22.04.
This is my first time, so I am trying to practice the openCV by following this website:

This example is about how to do camera calibration using XML ( I can tell )
So I copied the camera_calibration.cpp file, also the XML files based on their guidance.

I guess my error is coming from here:
I am not sure how to put the right path in my case.

do not post usage questions to the issue tracker.