Icons are not displayed.

[robiv8]

On the monitor of the Raspi the icons of the calendar are not displayed correctly or not at all.
In the browser on my Mac, however, they are displayed correctly.
How can I solve this?
Raspi:

On Mac in Chromebrowser:

[sdetweil]

@robiv8 are these icons IN the calendar entries?

[robiv8]

@sdetweil
i dont no?
This is the default calendar in MMM and i put only the datas.

{
			module: "calendar",
			header: "Papa&Mama Termine",
			position: "top_left",
			config: {
			    broadcastPastEvents: true, // <= IMPORTANT to see past events
				calendars: [
				{
				symbol: "calendar-check-o",
				url: "https://calendar.google.com/calendar/ical/123456%40gmail.com/private-xyz1234/basic.ics"
				}
			]
		}
	},	

[karsten13]

may missing emoji fonts, see https://forum.magicmirror.builders/topic/11263/majority-of-my-emoji-not-showing-on-rpb3

[robiv8]

@karsten13
Thanks, i installed the emoji fonts.
Now are in Black&White.