can't run "npm run start"

[actimbar]

@sdetweil by VNC desktop, I got stuck on step 4 of manual installation (npm install), I made a reboot before the error, now I’m trying (npm install) without VNC.
Now installation ended successfully!

[jefftse]

@sdetweil

Raspberry pi 4 raspbrian

[jefftse]

@sdetweil

I did and the same thing

[sdetweil]

@jefftse are u doing this over vnc without a real display?

the start script assumes a real display
change the package.json start to match your config

    "start": "DISPLAY=\"${DISPLAY:=:0}\" ./node_modules/.bin/electron js/electron.js",

the start command is

npm start 

[jefftse]

@sdetweil

I tried both. I even deleted the whole folder and reinstalled. Maybe electron is the problem.

[sdetweil]

@jefftse no, change the line in package.json
from

 "start": "DISPLAY=\"${DISPLAY:=:0}\" ./node_modules/.bin/electron js/electron.js",

to

 "start": "./node_modules/.bin/electron js/electron.js",

the error is " cannot open display: :0.0" typically, DISPLAY:0 is the physical display

[jefftse]

@sdetweil

just did that and the error is below

magicmirror@2.11.0 start /home/jeff/MagicMirror
electron js/electron.js

No protocol specified

(electron:32527): Gtk-WARNING **: 21:53:58.634: cannot open display: :0.0
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! magicmirror@2.11.0 start: electron js/electron.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the magicmirror@2.11.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! /home/jeff/.npm/_logs/2020-06-24T01_53_58_663Z-debug.log

[sdetweil]

@jefftse still trying to open display 0

what is the vnc display number? do

env | grep -i display

[jefftse]

@sdetweil

XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
DISPLAY=:0.0

[sdetweil]

@jefftse do u have a real display