@sdetweil
Before the MM-Update i copy all MagicMirror folders in an Backup folder. MM write in the backup guide:
Upgrade Guide
WARNING

Always backup your config.js, custom.css and modules folder before you start the upgrade process!

1. Stop MM
2. Copy my Backuped custom.css back in CSS folder
3. open with Geany save and Close
4. Start MM and it Works
5. I Rebootet mi Pi for testing and it continues Working.

Sorry for my English

@vpeter
Hi,
i have the same issue. After rebooting the Weather leave blank. Do you have a custom.css file before the MM-Update? The update erase this file. I recopy mi backuped custom.css and now it Works fine how bevore.

@sdetweil Thanks for your reply.
It’s a bit crazy. I completely reinstalled everything two days ago using copy and paste from the module page.
Then I copied the .env file from the old installation to the new installation.
Could this be because I copied the .env file from a backup into the directory after the reinstallation?
Thanks for the feedback, because I’d like to learn from my mistakes.

@MMRIZE

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?