Authentication Rejected: No auth protocols/host-based auth failed

[basic_beginner]

I am new to PyQt and am trying to learn the basics for GUI building. I am following a tutorial to build a window and a button that displays text, but I keep encountering this error. I am running a Manjaro distro with latest kernel.
qt5ct: using qt5ct plugin
Qt: Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed

#!/usr/bin/python3
# -*- coding: utf:8 -*-

import sys
from PyQt5.QtWidgets import (QWidget, QToolTip, 
    QPushButton, QApplication)
from PyQt5.QtGui import QFont    


class Example(QWidget):
    
    def __init__(self):
        super().__init__()
        
        self.initUI()
        
        
    def initUI(self):
        
        QToolTip.setFont(QFont('SansSerif', 10))
        
        self.setToolTip('This is a <b>QWidget</b> widget')
        
        btn = QPushButton('Button', self)
        btn.setToolTip('This is a <b>QPushButton</b> widget')
        btn.resize(btn.sizeHint())
        btn.move(50, 50)       
        
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Tooltips')    
        self.show()
        
if __name__ == '__main__':
    
    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())