@Carsten
Are you sure your link example is complete?
Is the following example $ curl -X GET http://magicmirrorip:8080/api/module/alert/showalert?message=Hello&timer=2000 working?
Details see https://github.com/Jopyth/MMM-Remote-Control/blob/master/API/README.md

AxLED

Hi to all MagicMirror users,

i just released Version 2 of my MMM-Dreambox module.

Download
[card:Ax-LED/MMM-Dreambox]

2.0 Changelog:

• optimized configuration options, to reduce complexity (see also minimum configuration in readme of module)
• added recordings mode (to stream recordings of your tuner to magic mirror)
• extended notification system to select recordings and tuner mode

Update:
Do a git pull in the MMM-Dreambox directory.

Thanks to @evroom for testing on different enigma2 receivers.

AxLED

@Vauxdvihl
Did you run a npm install after updating in the magicmirror directory?
As your log says that electron is missing.

AxLED

@3zq3mh
What happens or what messages are shown if you start your mm with npm start dev
AxLED

@cheng-cli
Maybe not a direct answer to your question, but you can also use calendar .ics files for displaying holidays (with the default calendar module of mm), see links:
https://github.com/MichMich/MagicMirror/tree/master/modules/default/calendar
https://www.calendarlabs.com/online-calendar/2019-calendar/
AxLED

@jhwwhite
See the tutorial, step 3. Link: https://forum.magicmirror.builders/topic/236/complete-setup-tutorial/6

AxLED

@Gryglas
If you enter pm2 list in a console, what is the result?
I guess your pm2 starts MagicMirror twice, as it will be installed by default from the MagicMirror installer script.

AxLED

@Cr4z33
Nice job, well done, very clean finish.
AxLED

I use Pixel Desktop Image inside of virtualbox, which works great for me.

AxLED

Try this thread save-performance-when-rotating-screen-e-g-on-raspberry-pi

AxLED