typically
module not found
means npm install for the module was not done or the package.json for the module didn’t list the library dependency. MMRIZE is very good on that point, so I don’t the second is the reason…

but thanks for the nudge… my backup/restore scripts will save/restore extra files discovered in a modules folder… but files with leading dot are hidden by convention… so I will have to check that

I would not have picked up the .env file… fixed… thx

git clone …
cd MMM-CalDAV
npm install

Hello,
Please Can you help me and Sorry for my bad English.

I have a Problem wit the CalDAV Module in Magic Mirror2.

in the pm2 error Log File i have this Message:
[2025-09-04 11:42:08.001] [ERROR] Error when loading MMM-CalDAV: Cannot find module ‘dotenv’
Require stack:

• /home/magicmirror/MagicMirror/modules/MMM-CalDAV/node_helper.js
• /home/magicmirror/MagicMirror/js/app.js
• /home/magicmirror/MagicMirror/js/electron.js
  [2025-09-04 11:42:08.379] [WARN] You’re using a full whitelist configuration to allow for all IPs
  [2025-09-04 11:42:17.749] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/FAMILY_Familienkalender.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  [2025-09-04 11:42:18.028] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/NINA_Arbeit.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  [2025-09-04 11:42:18.226] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/DOMINIQUE_Klasse7d.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  [2025-09-04 11:42:18.406] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/SAMUEL_Klasse4f.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  [2025-09-04 11:47:17.764] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/FAMILY_Familienkalender.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
  [2025-09-04 11:47:18.035] [ERROR] Calendar Error. Could not fetch calendar: http://localhost:8080/CALDAV/NINA_Arbeit.ics Error: Not Found
  at NodeHelper.checkFetchStatus (/home/magicmirror/MagicMirror/js/node_helper.js:102:9)
  at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

The following errors are clear thats the result from the First ERROR.

What im doing Wrong or thinking false?

Hello,
it’s working now, but without the MMM-CalDAV module.
I checked the url I’m using on my phone and just added it to the standard calendar module and added a “.ics” at the end of the url. Now it’s working. I tried this before and it wasn’t working.
Now it is.
Thanks for your help and support.

Best
Tillmann

No, it still doesn’t work. I checked the path of the .ics, which should be stored in /MagicMirror/MMM-CalDav/service/
as a hidden file, but I can only find the placeholder.txt

Tillmann

http://localhost:8080/CALDAV/SYNOLOGY_Calendar.ics

if you open that on browser someplace it works??

Hi Sam,

here is my config.

Thx

/* Config Sample
 *
 * For more information on how you can configure this file
 * see https://docs.magicmirror.builders/configuration/introduction.html
 * and https://docs.magicmirror.builders/modules/configuration.html
 *
 * You can use environment variables using a `config.js.template` file instead of `config.js`
 * which will be converted to `config.js` while starting. For more information
 * see https://docs.magicmirror.builders/configuration/introduction.html#enviromnent-variables
 */
let config = {
        address: "0.0.0.0",     // Address to listen on, can be:
                                                        // - "localhost", "127.0.0.1", "::1" to listen on loopback interface
                                                        // - another specific IPv4/6 to listen on a specific interface
                                                        // - "0.0.0.0", "::" to listen on any interface
                                                        // Default, when address config is left out or empty, is "localhost"
        port: 8080,
        basePath: "/",  // The URL path where MagicMirror² is hosted. If you are using a Reverse proxy
                                                                        // you must set the sub path here. basePath must end with a /
        ipWhitelist: [],        // Set [] to allow all IP addresses
                                                                        // or add a specific IPv4 of 192.168.1.5 :
                                                                        // ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.1.5"],
                                                                        // or IPv4 range of 192.168.3.0 --> 192.168.3.15 use CIDR format :
                                                                        // ["127.0.0.1", "::ffff:127.0.0.1", "::1", "::ffff:192.168.3.0/28"],

        useHttps: false,                        // Support HTTPS or not, default "false" will use HTTP
        httpsPrivateKey: "",    // HTTPS private key path, only require when useHttps is true
        httpsCertificate: "",   // HTTPS Certificate path, only require when useHttps is true

        language: "en",
        locale: "en-US",
        logLevel: ["INFO", "LOG", "WARN", "ERROR"], // Add "DEBUG" for even more logging
        timeFormat: 24,
        units: "metric",

        modules: [
                {       module: "MMM-CalDAV",
                        config: {
                                servers: [
                                {
                                 accountType: "caldav",
                                  envPrefix: "SYNOLOGY_",
                                 serverURL: "http://synology-ip/CalDav/",
                                },
                                ],
                                },
                },
                {
                        module: "alert",
                },
                {
                        module: "updatenotification",
                        position: "top_bar"
                },
                {
                        module: "clock",
                        position: "top_left"
                },
                {
                        module: "calendar",
                        header: "US Holidays",
                        position: "top_left",
                        config: {
                                calendars: [
                                        {
                                                url: "http://localhost:8080/CALDAV/SYNOLOGY_Calendar.ics",
                                                name: "Calendar",
                                                auth: {
                                                        user: 'username1',
                                                        pass: 'password1',
                                                        method: 'basic'
                                                },
                                        },
                                        ],
                                },
                },
                {
                        module: "compliments",
                        position: "lower_third"
                },
                {
                        module: "weather",
                        position: "top_right",
                        config: {
                                weatherProvider: "openmeteo",
                                type: "current",
                                lat: 51.31,
                                lon: 7.28
                        }
                },
                {
                        module: "weather",
                        position: "top_right",
                        header: "Weather Forecast",
                        config: {
                                weatherProvider: "openmeteo",
                                type: "forecast",
                                lat: 51.31,
                                lon: 7.28
                        }
                },
                {
                        module: "newsfeed",
                        position: "bottom_bar",
                        config: {
                                feeds: [
                                        {
                                                title: "New York Times",
                                                url: "https://rss.nytimes.com/services/xml/rss/nyt/HomePage.xml"
                                        }
                                ],
                                showSourceTitle: true,
                                showPublishDate: true,
                                broadcastNewsFeeds: true,
                                broadcastNewsUpdates: true
                        }
                },
        ]
};

/*************** DO NOT EDIT THE LINE BELOW ***************/
if (typeof module !== "undefined") { module.exports = config; }

use the code block wrapper on the config post here

I checked the URL, tried different versions. Used the tried the same URL I use on my smartphone (the url is working), but always get the same error.

I don’t know what to do or try.
I checked the firewall and port settings on my synology, but still the same error.

Do you have any other ideas?

Best
Tillmann

just fyi IP addresses 192.168.x.y NEVER cross the internet… they are ‘unroutable’ on purpose
172. and 10. are also like that

if you share that I cannot reach it…

mine network is 192.168.2.x

Maybe some settings on my synology are the problem?! I already checked the port, it’s open.

Best
Tillmann

Hello again,
sorry I had a lot of work at my job, but now I’m trying again to get this MM working.
The sync to my Synology-Calendar still isn’t working.

Here are my logs:

pi@raspy:~ $ pm2 logs mm
[TAILING] Tailing last 15 lines for [mm] process (change the value with --lines option)
/home/pi/.pm2/logs/mm-error.log last 15 lines:
0|mm       |     at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
0|mm       |     at async davRequest (/home/pi/MagicMirror/modules/MMM-CalDAV/node_modules/tsdav/dist/tsdav.cjs.js:158:25)
0|mm       |     at async fetchPrincipalUrl (/home/pi/MagicMirror/modules/MMM-CalDAV/node_modules/tsdav/dist/tsdav.cjs.js:1254:24)
0|mm       |     at async createAccount (/home/pi/MagicMirror/modules/MMM-CalDAV/node_modules/tsdav/dist/tsdav.cjs.js:1307:31)
0|mm       |     at async DAVClient.login (/home/pi/MagicMirror/modules/MMM-CalDAV/node_modules/tsdav/dist/tsdav.cjs.js:1659:15)
0|mm       |     at async Fetcher.work (/home/pi/MagicMirror/modules/MMM-CalDAV/node_helper.js:89:7) {
0|mm       |   [cause]: Error: getaddrinfo ENOTFOUND invalidcaldavserver.com
0|mm       |       at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:120:26) {
0|mm       |     errno: -3008,
0|mm       |     code: 'ENOTFOUND',
0|mm       |     syscall: 'getaddrinfo',
0|mm       |     hostname: 'invalidcaldavserver.com'
0|mm       |   }
0|mm       | }

Probably some auth. problem?
Maybe you got another idea.
I’m running the MM on an Raspberry Pi Zero.

Best
Till

/MagicMirror/modules/MMM-CalDAV/service/.ICLOUD_family.ics

this seems to imply the config for calendar doesn’t match the config for MMM-Caldav

caldav reads the real calendar and puts the data in the configured folder
and then the MM calendar loads it from the configured folder…

I am not the module author.

Thank you for your time. I believe am using a pi without a docker.

are you using a NAS device, synology? or is this on a pi, without docker?