@Andreas1956
You are clicking the day cell, not event.

ok, found the event cells now.
think the problem comes from the font-awesome symbols. i removed the symbol property from all 5 calendar entries, then everything was ok but no symbols (only the standard calendar symbol)
then i added symbol:[“trash”] to the calendar garbage again - title disappeared again.

@Andreas1956
You are clicking the day cell, not event.

ok, found the event cells now.
think the problem comes from the font-awesome symbols. i removed the symbol property from all 5 calendar entries, then everything was ok but no symbols (only the standard calendar symbol)
then i added symbol:[“trash”] to the calendar garbage again - title disappeared again.

1. Execute MM as dev mode.

• If you are using pm2, stop it first.
• In your MM directory, run this script.

npm run start:dev

2. Or alternatively, After MM’s normal execution, Ctrl + Shift + i (Or Alt+F12, it could be different by your system environment), Anyway, open the dev-console on the browser/client with hotkeys.

3. It will open this kind of dev-console as a side panel.

4. At the panel, you can see Elements or Console tab. Go to Elements Tab.

5. There would also be cursor icon (left side of the Elements Tab mark); select it and click to any event element

6. Now, the side Elements tab will focus on the HTML code for the element you clicked.
   

7. navigate into the title element

8. Check whether proper text exists there.

9. And See the Styles tab.(Somewhere in the side panel. Usually below the Elements window)

You can see there are --calendarColor and oppositeColor attributes there. And there is no other overridden colors.

10. Or you can check this in Computed tab.

There are some calculated results for the style.

Could you find any suspicious things on watching your case?

• did Points 1.-3.,
• changed .cx2 to .cx3 in css
• updated magicmirror too
• startet all new
• checked my google calendars - everything ok. on iPhone and iPad
• tried to remove the color property from one calendar entry

what i forgot to say, it’s running under windows11 (but since end of March 2023 without any problems)

Same as in screenshot, no text, only colored blocks for appointments

1. Go to the CX3 module directory, then;

git pull
npm update

I doubt you may miss npm update part in your last update process.

2. If it still does not work, do this in your CX3 module directory

git submodule update --init --recursive

3. Still not working; remove the CX3 directory and then reinstall again.

4. Still not working; let’s discuss deeper.

@Andreas1956
Share me the config and custom.css.
custom.css all lines

body {
	/* margin: 60px;*/
	margin: 20px;
	position: absolute;
	/*height: calc(100%-120px);
	width: calc(100%-120px);*/
	height: calc(100%-60px);
	width: calc(100%-60px);
}

.CX2 .luett {
	background-color: #FF4500;
	color: #FFFFFF;
}
.CX2 .luett.fullday {
	background-color: #FF4500;
	color: #FFFFFF;
}
.CX2 .mueller {
	background-color: #7CFC00;
	color: #000000;
}
.CX2 .mueller.fullday {
	background-color: #7CFC00;
	color: #000000;
}
.MMM-Fuel .xsmall {
  font-size: 10px;
  line-height: 15px;
}

.MMM-Fuel .small {
  font-size: 15px;
  line-height: 20px;
}

.MMM-Fuel .medium {
  font-size: 25px;
  line-height: 30px;
}

.MMM-Fuel .large {
  font-size: 55px;
  line-height: 55px;
}

.MMM-Fuel .xlarge {
  font-size: 65px;
  line-height: 65px;
}
.MMM-RTSPStream .innerWrapper {
  position: relative;
  width: 352px; /* Video width + 2*border + 2*padding */
  height: 242px;
  border: 0px solid white;
}

config.js only lines of calendar module

		{
			module: "calendar",
			// position: "top_left",
			config: {
				maximumEntries: 100,
				fetchInterval:600000,
				broadcastPastEvents: true,
				calendars: [
				{
					name: "Luett",
					//className: "luett",
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",	
					color: "red",
					//calendarSeq: 1,
					symbol: ["house"]
				},
				{
					name: "Mueller",
					//className: "mueller", 
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",	
					color: "green",
					//calendarSeq: 2,
					symbol: ["bed"]
				},
			
				{
					name: "Termine",
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",
					color: "blue",
					//calendarSeq: 3,
					symbol: ["clock"]					
				},
				{
					name: "Garbage",
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",	
					color: "grey",
					//calendarSeq: 4,
					symbol: ["trash-alt"]
				},
				{
					name: "Gezeiten",
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",
					//color: "blue",
					//calendarSeq: 5,
					symbol: ["water"]
					
				},
				{
					name: "Feiertage",
					url: "https://calendar.google.com/calendar/ical/TOPSECRET/basic.ics",
					color: "brown",
					symbol: ["tree"]
				},
						]
			}
		},

{
			module: "MMM-CalendarExt3",
			position: "middle_center",
			title: "",
			config: {
				mode: "week",
				weekIndex: 0,
				weeksInView: 4,
				instanceId: "basicCalendar",
				locale: 'de-DE',
				//useSymbol: false,
				maxEventLines: 4,
				firstDayOfWeek:1,
				//CalendarSet: ["Luett", "Mueller", "Termine", "Garbage", "Gezeiten", "Feiertage" ],
				CalendarSet: [],
			}
		},
{

did you npm install after git pull?