Process finished with exit code -1073740791 (0xC0000409) in pycharm PyQt5 + sqlite

from PyQt5 import QtCore, QtGui, QtWidgets
from classeAdmin import Ui_Dialog
import sqlite3

class Ui_MainWindow(object):
    def messagebox(self, title, message):
        mess = QtWidgets.QMessageBox()
        mess.setWindowTitle(title)
        mess.setText(message)
        mess.setStandardButtons(QtWidgets.QMessageBox.ok)
        mess.exec_()

    def connexion(self):
        login=self.lineEdit.text()
        password=self.lineEdit_2.text()

        conn = sqlite3.connect('MyDB.db')
        cur=conn.cursor()
        cur.execute('SELECT * FROM personne where login = Admin and password= Admin'(login,password))
        conn.commit()
        cur.close()
        conn.close()
        if len(cur.fetchall()) > 0 :
            app = QtWidgets.QApplication(sys.argv)
            Dialog = QtWidgets.QDialog()
            ui = Ui_Dialog()
            ui.setupUi(Dialog)
            Dialog.show()
            Dialog.exec_()

        else:
         self.messagebox("erreur","donner un utilisateur valide")

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(811, 594)
        MainWindow.setMinimumSize(QtCore.QSize(811, 594))
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(0, 0, 281, 81))
        self.label.setText("")
        self.label.setPixmap(QtGui.QPixmap("logo.png"))
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(0, 380, 231, 171))
        self.label_2.setText("")
        self.label_2.setPixmap(QtGui.QPixmap("images.jpg"))
        self.label_2.setObjectName("label_2")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(380, 140, 331, 71))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.lineEdit.setFont(font)
        self.lineEdit.setObjectName("lineEdit")
        self.label_3 = QtWidgets.QLabel(self.centralwidget)
        self.label_3.setGeometry(QtCore.QRect(190, 150, 131, 51))
        font = QtGui.QFont()     
        font.setPointSize(18)
        self.label_3.setFont(font)
        self.label_3.setAlignment(QtCore.Qt.AlignCenter)
        self.label_3.setObjectName("label_3")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setGeometry(QtCore.QRect(380, 260, 331, 71))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.lineEdit_2.setFont(font)
        self.lineEdit_2.setEchoMode(QtWidgets.QLineEdit.Password)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.label_4 = QtWidgets.QLabel(self.centralwidget)
        self.label_4.setGeometry(QtCore.QRect(190, 270, 151, 51))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.label_4.setFont(font)
        self.label_4.setAlignment(QtCore.Qt.AlignCenter)
        self.label_4.setObjectName("label_4")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(330, 390, 171, 61))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")

        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setGeometry(QtCore.QRect(550, 390, 181, 61))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.pushButton_2.setFont(font)
        self.pushButton_2.setObjectName("pushButton_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 811, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
        ui.pushButton.clicked.connect(self.connexion)
        ui.pushButton_2.clicked.connect(quit)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label_3.setText(_translate("MainWindow", "UserName"))
        self.label_4.setText(_translate("MainWindow", "Password"))
        self.pushButton.setText(_translate("MainWindow", "Se connecter"))
        self.pushButton_2.setText(_translate("MainWindow", "Quitter "))

if __name__ == "__main__":

    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()     
    ui = Ui_MainWindow()      
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())