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我正在尝试使用 Qt 和 C++ 在 Arch Linux 下制作表单应用程序，但是当我尝试运行以下应用程序时：

第一个窗口.h

#include <QMainWindow>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>
#include <QLayout>

class firstWindow:public QMainWindow
{
    Q_OBJECT

    public:
        QLabel       *lbl;
        QPushButton  *btn;
        QLineEdit    *row;

    firstWindow():QMainWindow()
    {
        setWindowTitle("First Window");
        QWidget *win = new QWidget(this);
        setCentralWidget(win);

        lbl = new QLabel("Hello Universe", win);
        btn = new QPushButton("Click Click", win);
        row = new QLineEdit(win);

        QVBoxLayout *main = new QVBoxLayout(win);
        main->addWidget(win);

        QHBoxLayout *nextTo = new QHBoxLayout();
        nextTo->addWidget(row);
        nextTo->addWidget(btn);
        main->addLayout(nextTo);

        resize(200,50);
        win->show();
    }
};

编译后，我得到这个错误：

#qmake -project
#qmake
#make
# ./QtFirstWindow
(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

(process:21806): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
Qt: Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported

它不会停止或终止应用程序，但也不会运行它。我认为该错误与我编写的代码无关，因为它只是一个小示例。那么我该如何处理呢？任何想法？

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