I changed my port - which seems like it might interfere. So, my config looks like:

address : '0.0.0.0',
	port: 60001,
	ipWhitelist: [],

// Remote-Control
		{
			module: 'MMM-Remote-Control',
			//position: 'top_bar',
			config: {
				//showModuleApiMenu: true,
        //apiKey: "85237761aaf14513a6007e9989a465a3",
			}
		},

Here is what the output look like:

pi@magicmirror:~/MagicMirror $ npm start

> magicmirror@2.10.1 start /home/pi/MagicMirror
> ./run-start.sh

[11:52:56.840] [LOG]    Starting MagicMirror: v2.10.1
[11:52:56.869] [LOG]    Loading config ...
[11:52:56.908] [LOG]    Loading module helpers ...
[11:52:56.915] [LOG]    No helper found for module: alert.
[11:52:57.153] [LOG]    Initializing new module helper ...
[11:52:57.156] [LOG]    Module helper loaded: updatenotification
[11:52:57.177] [LOG]    Initializing new module helper ...
[11:52:57.179] [LOG]    Module helper loaded: MMM-BurnIn
[11:52:57.187] [LOG]    Initializing new module helper ...
[11:52:57.188] [LOG]    Module helper loaded: MMM-WatchDog
[11:52:57.453] [LOG]    Initializing new module helper ...
[11:52:57.456] [LOG]    Module helper loaded: MMM-Remote-Control
[11:52:57.461] [LOG]    No helper found for module: currentweather.
[11:52:57.467] [LOG]    No helper found for module: compliments.
[11:52:57.475] [LOG]    No helper found for module: clock.
[11:52:57.477] [LOG]    No helper found for module: calendar_monthly.
[11:52:59.221] [LOG]    Initializing new module helper ...
[11:52:59.223] [LOG]    Module helper loaded: calendar
[11:53:05.323] [LOG]    Initializing new module helper ...
[11:53:05.325] [LOG]    Module helper loaded: MMM-Buller
[11:53:06.691] [LOG]    Initializing new module helper ...
[11:53:06.694] [LOG]    Module helper loaded: MMM-DarkSkyForecast
[11:53:06.702] [LOG]    No helper found for module: MMM-DailyPokemon.
[11:53:06.708] [LOG]    No helper found for module: MMM-MBTA.
[11:53:06.714] [LOG]    No helper found for module: MMM-MBTA1.
[11:53:06.720] [LOG]    No helper found for module: MMM-MBTA2.
[11:53:08.583] [LOG]    Initializing new module helper ...
[11:53:08.585] [LOG]    Module helper loaded: MMM-MyCommute
[11:53:08.586] [LOG]    No helper found for module: MMM-pihole-stats.
[11:53:08.588] [LOG]    All module helpers loaded.
[11:53:08.591] [LOG]    Starting server on port 60001 ...
[11:53:08.609] [INFO]   You're using a full whitelist configuration to allow for all IPs
[11:53:08.624] [LOG]    Server started ...
[11:53:08.627] [LOG]    Connecting socket for: updatenotification
[11:53:08.630] [LOG]    Connecting socket for: MMM-BurnIn
[11:53:08.633] [LOG]    Connecting socket for: MMM-WatchDog
[11:53:08.635] [LOG]    Starting module helper: MMM-WatchDog
[11:53:08.637] [LOG]    Connecting socket for: MMM-Remote-Control
[11:53:08.639] [LOG]    Starting node helper for: MMM-Remote-Control
[11:53:08.713] [LOG]    Connecting socket for: calendar
[11:53:08.715] [LOG]    Starting node helper for: calendar
[11:53:08.717] [LOG]    Connecting socket for: MMM-Buller
[11:53:08.721] [LOG]    Connecting socket for: MMM-DarkSkyForecast
[11:53:08.722] [LOG]    ====================== Starting node_helper for module [MMM-DarkSkyForecast]
[11:53:08.724] [LOG]    Connecting socket for: MMM-MyCommute
[11:53:08.726] [LOG]    ====================== Starting node_helper for module [MMM-MyCommute]
[11:53:08.727] [LOG]    Sockets connected & modules started ...
[11:53:09.118] [LOG]    Launching application.
[11:53:18.043] [LOG]    WatchDog started. Maximum timeout: 25s.
[11:53:18.543] [LOG]    Create new calendar fetcher for url: http://www.calendarlabs.com/ical-calendar/ics/76/US_Holidays.ics - Interval: 300000
[11:53:18.704] [LOG]    Create new calendar fetcher for url: https://calendar.google.com/calendarxxxxx
[11:53:18.836] [LOG]    Create new calendar fetcher for url: https://calendar.google.com/calendarxxxxxx
[11:53:21.289] [LOG]    Task lists:
[11:53:21.293] [LOG]    To read (xxxx)
[11:53:21.295] [LOG]    Ideas (xxxxDQzNDow)
[11:53:21.296] [LOG]    Life (xxxx)
[11:53:21.298] [LOG]    Random thoughts (xxxx)
[11:53:21.300] [LOG]    HomeToDo (xxxx)
[11:53:21.302] [LOG]    PlantBabies (xxxx)
[11:53:21.304] [LOG]    Shopping (xxxx)

Pi-hole stats not only fails to load, the whole setup crashes every 2 moinutes or so

[17764:0222/114938.526868:FATAL:memory_linux.cc(36)] Out of memory.

 xxxxxxxxxxxxxx:8080/remote.html 

ip must be the same like in ip whitelist,
it must be the ip of you device you want (tablet or phone ore pc) for controlling your magic mirror

replace the xxxx with your ip address …thats it

I use 60001.

listen on all interfaces (ethernet, wireless, maybe pi-hole creates one?, in which case you would need to specifiy the address of the prefered interface, ethernet for example, or wifi… but JUST ONE)

ipWhitelist:[] means allow anyone to connect on the interface and port

address: “localhost”,
port: 8080,
ipWhitelist: [“127.0.0.1”, “::ffff:127.0.0.1”, “::1”, “::ffff:192.168.1.114”],

this setup means ONLY apps INSIDE the pi can connect to the MagicMirror app

so, change it to

address: "0.0.0.0", 
	port: 8080,
	ipWhitelist: [], 

that allows ANY system to connect