Read the statement by Michael Teeuw here.
Troubleshooting MagicMirror
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 Is there any way to get an overview when I’m editing the config.js file 
 I tried a web access to pi’s ip address and port from another computer on the same network but it’s not working even if i specified the ip address of pi in address section and allowed all ip addresses in ipwhitelist section!!
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 This is not working for you? var config = { address: "localhost", port: 8080, ipWhitelist: [],
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 @mykle1 unfortunately not. 
 I put the wlan0 ip address of my pi instead of localhost and it’s not working neither.
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 @mykle1 Nope even locally 
 I’ll scan all my ports and check if 8080 is already used
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 @oththegentel enable VNC and patch in using that, I’m doing changes on my phone using that method it’s not the best given the screen size normally I do adjustments on the Mac when I can be bothered to boot it up, last minute changes are done on the phone. 
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 @oththegentel It sounds like your MagicMirror instance is not running. 
 How did you start MagicMirror, do you havepm2installed?


