this is the reply now:

pi@raspberrypi:~/MagicMirror $ npm start

> magicmirror@2.3.1 start /home/pi/MagicMirror
> sh run-start.sh

Starting MagicMirror: v2.3.1
Loading config ...
Loading module helpers ...
No helper found for module: alert.
Initializing new module helper ...
Module helper loaded: updatenotification
No helper found for module: clock.
Initializing new module helper ...
Module helper loaded: calendar
No helper found for module: compliments.
No helper found for module: currentweather.
No helper found for module: weatherforecast.
Initializing new module helper ...
Module helper loaded: newsfeed
Initializing new module helper ...
Module helper loaded: MMM-Remote-Control-Repository
Initializing new module helper ...
Module helper loaded: MMM-Remote-Control
Initializing new module helper ...
Module helper loaded: MMM-TelegramBot
Initializing new module helper ...
Module helper loaded: MMM-PIR-Sensor
Initializing new module helper ...
Module helper loaded: MMM-Todoist
All module helpers loaded.
Starting server on port 8080 ...
You're using a full whitelist configuration to allow for all IPs
Server started ...
Connecting socket for: updatenotification
Connecting socket for: calendar
Starting node helper for: calendar
Connecting socket for: newsfeed
Starting module: newsfeed
Connecting socket for: MMM-Remote-Control-Repository
Connecting socket for: MMM-Remote-Control
Starting node helper for: MMM-Remote-Control
Connecting socket for: MMM-TelegramBot
Connecting socket for: MMM-PIR-Sensor
Connecting socket for: MMM-Todoist
Starting node helper for: MMM-Todoist
Sockets connected & modules started ...
Launching application.
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'refs' of undefined
(node:19302) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'refs' of undefined
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: Cannot read property 'refs' of undefined
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): TypeError: Cannot read property 'refs' of undefined
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): TypeError: Cannot read property 'refs' of undefined
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): TypeError: Cannot read property 'refs' of undefined
(node:19302) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 7): TypeError: Cannot read property 'refs' of undefined
Create new calendar fetcher for url: https://calendar.google.com/calendar/ical/m9e75p8rl08l641vc5cm4bhrtg%40group.calendar.google.com/public/basic.ics - Interval: 300000
Create new calendar fetcher for url: http://www.schwarze-elster.de/touren/getICalendar.php?reminder=0&ort=1&from=1.4.2018&to=31.12.2018&tonnen=12354 - Interval: 300000
Create new news fetcher for url: http://www.spiegel.de/schlagzeilen/tops/index.rss - Interval: 300000
[RCREPO] Repository scanning...
[RCREPO] modules.json is updated.

Thank you for your reply. You are right. Nevertheless is there another Error :

(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'refs' of undefined
(node:7234) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 7): TypeError: Cannot read property 'refs' of undefined

What means this ?

hello
i have a problem. the magicmirror installation was succesfull and i tried a few things. ive made a break and now i thougt i can continue my work. but when i type npm start in MagicMirror folder i get this errorcode

> magicmirror@2.3.1 start /home/pi/MagicMirror
> sh run-start.sh

Starting MagicMirror: v2.3.1
Loading config ...
Loading module helpers ...
No helper found for module: alert.
Initializing new module helper ...
Module helper loaded: updatenotification
No helper found for module: clock.
Initializing new module helper ...
Module helper loaded: calendar
No helper found for module: compliments.
No helper found for module: currentweather.
No helper found for module: weatherforecast.
Initializing new module helper ...
Module helper loaded: newsfeed
Initializing new module helper ...
Module helper loaded: MMM-Remote-Control-Repository
Initializing new module helper ...
Module helper loaded: MMM-Remote-Control
Initializing new module helper ...
Module helper loaded: MMM-TelegramBot
Initializing new module helper ...
Module helper loaded: MMM-PIR-Sensor
Initializing new module helper ...
Module helper loaded: MMM-Todoist
All module helpers loaded.
Starting server on port 8080 ...
You're using a full whitelist configuration to allow for all IPs
Server started ...
Connecting socket for: updatenotification
Connecting socket for: calendar
Starting node helper for: calendar
Connecting socket for: newsfeed
Starting module: newsfeed
Connecting socket for: MMM-Remote-Control-Repository
Connecting socket for: MMM-Remote-Control
Starting node helper for: MMM-Remote-Control
Connecting socket for: MMM-TelegramBot
Connecting socket for: MMM-PIR-Sensor
Connecting socket for: MMM-Todoist
Starting node helper for: MMM-Todoist
Sockets connected & modules started ...
Whoops! There was an uncaught exception...
{ Error: listen EADDRINUSE 127.0.0.1:8080
    at Object.exports._errnoException (util.js:1050:11)
    at exports._exceptionWithHostPort (util.js:1073:20)
    at Server.setupListenHandle [as _listen2] (net.js:1263:14)
    at listenInCluster (net.js:1304:12)
    at doListen (net.js:1428:7)
    at GetAddrInfoReqWrap.asyncCallback [as callback] (dns.js:62:16)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:78:10)
  code: 'EADDRINUSE',
  errno: 'EADDRINUSE',
  syscall: 'listen',
  address: '127.0.0.1',
  port: 8080 }
MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues
Launching application.
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'refs' of undefined
(node:7234) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 4): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 5): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 6): TypeError: Cannot read property 'refs' of undefined
(node:7234) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 7): TypeError: Cannot read property 'refs' of undefined

i hope you can help me. sorry for my bad english