qt.qpa.xcb: could not connect to display :0.0 qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

这个错误是由于远程连接服务器时无法直接传回图形界面导致的。这个错误通常在使用Qt库时出现，比如在代码中使用了cv.imshow()函数。解决这个问题的方法是注释掉相关的代码，不要使用cv.imshow()函数。另外，你可以尝试在终端中输入sudo vim /etc/profile命令来编辑配置文件，然后添加一行代码来解决这个问题。
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