Rqt_image_view rqt_image_view QXcbConnection: XCB error: 2

I’m running the command in webshell 1: rosrun rqt_image_view rqt_image_view in the “Unit 1: Create your own ROS Package that Recognises Images with TensorFlow” but I get an connection error and the Image Topic window never shows up like the instructions indicated.

I had no issue doing it. Bear in mind that it might take even 30 seconds or so to get running.
It depends on the processes that have been there already. This is because the system in RobotIgniteaccademy, especially in this course is pushed to the limit. In ROSDevelopement Studio in the bigger instances, you will for sure have better performance. Just be patient.