function createAddItemWindow() {

    // Create a new window
    addItemWindown = new BrowserWindow({
        width: 300,
        height: 200,
        title: 'Add Item',

        // The lines below solved the issue
        webPreferences: { //根据上方的代码查找  然后加上这段代码
            nodeIntegration: true,
            contextIsolation: false
        }
})}