@sdetweil so this is the result:
pi@raspberrypi:~/MagicMirror $ npm start
> magicmirror@2.10.0 start /home/pi/MagicMirror
> ./run-start.sh
+ ./untrack-css.sh
+ '[' -z '' ']'
+ export DISPLAY=:0
+ DISPLAY=:0
++ uname -m
+ arch=armv7l
+ false=false
++ grep -v '^\s//' config/config.js
++ grep -i serveronly:
++ tr -d ',"'\'''
++ awk '{print tolower($2)}'
+ serveronly=
+ serveronly=false
++ pgrep Xorg
+ xorg=519
++ uname
+ mac=Linux
+ '[' false. '!=' false. -o armv7l == armv6l ']'
+ '[' 519. == . -a Linux '!=' Darwin ']'
+ electron js/electron.js
[15:39:07.703] [LOG] Starting MagicMirror: v2.10.0
[15:39:07.725] [LOG] Loading config ...
[15:39:07.735] [LOG] Loading module helpers ...
[15:39:07.814] [LOG] Initializing new module helper ...
[15:39:07.817] [LOG] Module helper loaded: updatenotification
[15:39:07.819] [LOG] No helper found for module: clock.
[15:39:08.557] [LOG] Initializing new module helper ...
[15:39:08.558] [LOG] Module helper loaded: MMM-SystemStats
[15:39:08.559] [LOG] No helper found for module: currentweather.
[15:39:08.560] [LOG] No helper found for module: weatherforecast.
[15:39:08.561] [LOG] No helper found for module: random_quotes.
[15:39:08.564] [LOG] Initializing new module helper ...
[15:39:08.564] [LOG] Module helper loaded: MMM-homeassistant-sensors
[15:39:09.297] [LOG] Initializing new module helper ...
[15:39:09.298] [LOG] Module helper loaded: MMM-UKNationalRail
[15:39:09.299] [LOG] No helper found for module: MMM-TFL.
[15:39:09.368] [LOG] Initializing new module helper ...
[15:39:09.369] [LOG] Module helper loaded: newsfeed
[15:39:09.370] [LOG] All module helpers loaded.
[15:39:09.372] [LOG] Starting server on port 8181 ...
[15:39:09.389] [INFO] You're using a full whitelist configuration to allow for all IPs
[15:39:09.408] [LOG] Server started ...
[15:39:09.410] [LOG] Connecting socket for: updatenotification
[15:39:09.413] [LOG] Connecting socket for: MMM-SystemStats
[15:39:09.415] [LOG] Connecting socket for: MMM-homeassistant-sensors
[15:39:09.418] [LOG] Connecting socket for: MMM-UKNationalRail
[15:39:09.420] [LOG] MMM-UKNationalRail helper started ...
[15:39:09.421] [LOG] Connecting socket for: newsfeed
[15:39:09.422] [LOG] Starting module: newsfeed
[15:39:09.423] [LOG] Sockets connected & modules started ...
[15:39:09.587] [LOG] Whoops! There was an uncaught exception...
[15:39:09.588] [ERROR] { Error: listen EADDRINUSE 127.0.0.1:8181
at Server.setupListenHandle [as _listen2] (net.js:1330:14)
at listenInCluster (net.js:1378:12)
at GetAddrInfoReqWrap.doListen [as callback] (net.js:1492:7)
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:55:10)
errno: 'EADDRINUSE',
code: 'EADDRINUSE',
syscall: 'listen',
address: '127.0.0.1',
port: 8181 }
[15:39:09.605] [LOG] MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
[15:39:09.605] [LOG] If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues
[15:39:09.652] [LOG] Launching application.