@MMRIZE Hi Im also having the exact same issue as @Lilleberg , I have however seen glimpses of this working as intended but it seems to be on a whim, either it restarts and works and then not again untill a further reboot or it just wont. I find it weird that using MMM-CalendarExt3Journal works perfect every time with similar settings. Any ideas on what may be going on? Weird thing is leaving the MMM running all the sudden it works like 20-30min later, so im wondering if theres some weirdness with how the data comes in from the GoogleCalendar module
Heres my config for refrence:

{
    		module: 'MMM-GoogleCalendar',
   			header: "My Google Private Cal",
  			position: "upper_third",
			hiddenOnStartup: true,
 			config: {
				broadcastEvents: true,
				broadcastPastEvents: true,
				calendars: [
						{
							symbol: "calendar-week",
							calendarID: "***",
							name: "1_cal", // <= RECOMMENDED to assign name
							color: "yellow" // <= RECOMMENDED to assign color
						},
						{
							symbol: "calendar-week",
							calendarID: "***",
							name: "2_cal", // <= RECOMMENDED to assign name
							color: "red" // <= RECOMMENDED to assign color
						},
						{
							symbol: "calendar-week",
							calendarID: "en.canadian#holiday@group.v.calendar.google.com",
							name: "holiday_cal", // <= RECOMMENDED to assign name
							color: "green" // <= RECOMMENDED to assign color
						},
						
				],
			}
		},
		{
  			module: "MMM-CalendarExt3",
  			position: "lower_third",
			title: "Family Calendar",
  			config: {
				mode: "month",
				instanceID: "I-calendar-month",
				maxEventLines: 5,
				firstDayOfWeek: 1,
				preProcessor: (e) => {
					if (e.start?.dateTime) {
				  		e.startDate = new Date(e.start.dateTime).valueOf()
					} else if (e.start?.date) {
				  		e.startDate = new Date(`${e.start.date}T00:00:00`).valueOf()
					}

					if (e.end?.dateTime) {
				  		e.endDate = new Date(e.end.dateTime).valueOf()
					} else if (e.end?.date) {
				  		e.endDate = new Date(`${e.end.date}T00:00:00`).valueOf()
					}

					e.title = e.summary
					e.fullDayEvent = (e.start?.date) ? true : false
					return e
				},
  			}
		},
//		{
//  			module: "MMM-CalendarExt3Journal",
//  			position: "bottom_bar",
//  			config: {
//				height: '50vh',
//   			 	width: '100%',
//				//locale: 'en-GB',
//				staticWeek: true,
//				staticTime: true,
//				hourLength: 14,
//				beginHour:  8,
//				preProcessor: (e) => {
//					if (e.start?.dateTime) {
//				  		e.startDate = new Date(e.start.dateTime).valueOf()
//					} else if (e.start?.date) {
//				  		e.startDate = new Date(`${e.start.date}T00:00:00`).valueOf()
//					}
//
//					if (e.end?.dateTime) {
//				  		e.endDate = new Date(e.end.dateTime).valueOf()
//					} else if (e.end?.date) {
//				  		e.endDate = new Date(`${e.end.date}T00:00:00`).valueOf()
//					}
//
//					e.title = e.summary
//					e.fullDayEvent = (e.start?.date) ? true : false
//					return e
//				}
//  			}
//		},