I want to used this module but when i config the file config.js ; i have no calendar on my screen. Please find bellow my config. Can you help me !! Thanks a lot

{
		module: "MMM-CalendarWeek",
		position: "bottom_left",	// This can be any of the regions. Best results in bottom region.
		config: {
			showEndDate: true,
			displayLocation: true,
			displayDescription: true,

			calendars: [
			{
			symbol: "calendar-check-o",
			maximumNumberOfDays: 1,
			url: 'xxx.ics',
			
			auth: {
			    user: 'xxx@xx.com',
			    pass: 'xxx',
			    method: 'basic'
				}
			},
				],
			},
		},