Thanks for posting that but even with that config it is still blank. I have to leave it for now but will start on it fresh tomorrow and rebuild it and see what happens. Hopefully it is just something simple I missed.

I did run nmp install in the MMM-CalendarExt3 folder!

This is the result of the Ext3 filter in the console

Load script: modules/MMM-CalendarExt3/MMM-CalendarExt3.js
module.js:489 Module registered: MMM-CalendarExt3
loader.js:151 Bootstrapping module: MMM-CalendarExt3
loader.js:155 Scripts loaded for: MMM-CalendarExt3
loader.js:194 Load stylesheet: modules/MMM-CalendarExt3/MMM-CalendarExt3.css
loader.js:158 Styles loaded for: MMM-CalendarExt3
loader.js:161 Translations loaded for: MMM-CalendarExt3
MMM-CalendarExt3.js:390 [CX3] Module is not prepared yet, wait a while.
getDom @ MMM-CalendarExt3.js:390Understand this warningAI

Even setting the waitFetch to 60 secods doesn’t help, the regualr calendar populates straight way, well before the Ext3 shows.

[2025-03-20 15:43:53.544] [LOG]   Starting MagicMirror: v2.31.0-develop
[2025-03-20 15:43:53.554] [LOG]   Loading config ...
[2025-03-20 15:43:53.555] [LOG]   config template file not exists, no envsubst
[2025-03-20 15:43:53.732] [INFO]  Checking config file /home/scott/MagicMirror/config/config.js ...
[2025-03-20 15:43:53.758] [INFO]  Your configuration file doesn't contain syntax errors :)
[2025-03-20 15:43:53.758] [INFO]  Checking modules structure configuration ...
[2025-03-20 15:43:53.795] [INFO]  Your modules structure configuration doesn't contain errors :)
[2025-03-20 15:43:53.797] [LOG]   Loading module helpers ...
[2025-03-20 15:43:53.797] [LOG]   No helper found for module: alert.
[2025-03-20 15:43:53.797] [LOG]   No helper found for module: clock.
[2025-03-20 15:43:53.842] [LOG]   Initializing new module helper ...
[2025-03-20 15:43:53.843] [LOG]   Module helper loaded: calendar
[2025-03-20 15:43:53.843] [LOG]   No helper found for module: MMM-CalendarExt3.
[2025-03-20 15:43:53.843] [LOG]   All module helpers loaded.
[2025-03-20 15:43:53.846] [LOG]   Starting server on port 8089 ...
[2025-03-20 15:43:54.112] [LOG]   Server started ...
[2025-03-20 15:43:54.113] [LOG]   Connecting socket for: calendar
[2025-03-20 15:43:54.113] [LOG]   Starting node helper for: calendar
[2025-03-20 15:43:54.113] [LOG]   Sockets connected & modules started ...
[2025-03-20 15:43:54.311] [LOG]   Launching application.
[2025-03-20 15:43:54.742] [INFO]  System information:
### SYSTEM:   manufacturer: ; model: ; virtual: false
### OS:       platform: linux; distro: Debian GNU/Linux; release: 12; arch: arm64; kernel: 6.6.74+rpt-rpi-2712
### VERSIONS: electron: 32.2.7; used node: 23.9.0; installed node: 23.9.0; npm: 10.9.2; pm2: 5.4.3
### OTHER:    timeZone: Europe/London; ELECTRON_ENABLE_GPU: undefined
[2025-03-20 15:43:55.080] [LOG]   Create new calendarfetcher for url: http://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics - Interval: 3600000
[2025-03-20 15:43:55.817] [INFO]  Calendar-Fetcher: Broadcasting 23 events from http://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics.

@sdetweil I don’t run under pm2 but will look at that just now

I have rad this post here which describes exactly the issue I am having. Both the CalendarExt3 and MonthlyCalendar modules are not populating with events even though they are being broadcast.

I have V2.31.0 after putting on the clipping fix. config is below.

        {
            module: "calendar",
            position: "top_left",
            header: "TestCalendar",
            config: {
                broadcastPastEvents: true, // <= IMPORTANT to see past events
                instanceId: "WeeklyCalendar",
                calendars: [
                    {
                        url: "webcal://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics",
                        name: "hols",
                        color: "red",
                        symbol: true
                    },
                ],
            }
        },

        {
            module: "MMM-MonthlyCalendar",
            position: "bottom_bar",
            config: { // See "Configuration options" for more information.
                mode: "fourWeeks",
          }
        }
// CX3 Module
/*        {
            module: "MMM-CalendarExt3",
            position: "bottom_bar",
            title: "Calendar",
            config: {
                mode: "week",
                instanceId: "WeeklyCalendar",
                locale: 'en-GB',
                maxEventLines: 5,
                firstDayOfWeek: 0,
                weekIndex: 0,
                weeksInView: 4,
                waitFetch: 1000 * 10, //        (ms) waiting the fetching of last calendar to prevent flickering view by too frequent fetching.
                refreshInterval: 1000 * 60 * 10, //     (ms) refresh view by force if you need it.
                glanceTime: 1000 * 60 * 10,     // (ms) Return to original view when you move to other moment by notification.
                eventTimeOptions: {
                    timeStyle: "short"
                },
                useSymbol: true,
                calendarSet: ['hols'],
                }
        },
*/

There is a warning in the console using the CalendarExt3 but not the Monthly Calendar, not sure if it is relevant to this.

I am fairly new to this so quite likely I have missed something obvious. I have MM running on a Pi Zero 2W and a Pi 5, both installed using the install script and then clipping fix and same isssue on both.

slicing events total maxcount=10
MMM-CalendarExt3.js:390 [CX3] Module is not prepared yet, wait a while.
getDom @ MMM-CalendarExt3.js:390
(anonymous) @ main.js:132
updateDom @ main.js:112
(anonymous) @ main.js:55
createDomObjects @ main.js:14
modulesStarted @ main.js:604
startModules @ loader.js:46
await in startModules
loadNextModule @ loader.js:239
await in loadNextModule
loadNextModule @ loader.js:232
await in loadNextModule
loadNextModule @ loader.js:232
await in loadNextModule
loadNextModule @ loader.js:232
await in loadNextModule
loadNextModule @ loader.js:232
await in loadNextModule
loadModules @ loader.js:242
await in loadModules
init @ main.js:588
await in init
(anonymous) @ main.js:737Understand this warningAI
calendar.js:703 sorting events count=23