@sdetweil i try to find this .log but no one is generating … i search in all of my hdd …
when i type npm start

C:\Users\gizmo\MagicMirror>npm start

> magicmirror@2.15.0 start
> node_modules/.bin/electron js/electron.js

"node_modules" non è riconosciuto come comando interno o esterno,
 un programma eseguibile o un file batch.

and there’s no electron js FOLDER in .bin FOLDER

@sdetweil ok done , but no log is generated
npm start

same errors :-(

@sdetweil only the name ?
2021-05-28T12_56_04_242Z-debug

0 verbose cli [
0 verbose cli   'C:\\Program Files\\nodejs\\node.exe',
0 verbose cli   'C:\\Users\\gizmo\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js',
0 verbose cli   'install',
0 verbose cli   'only=prod'
0 verbose cli ]
1 info using npm@7.14.0
2 info using node@v14.17.0
3 timing npm:load:whichnode Completed in 8ms
4 timing config:load:defaults Completed in 9ms
5 timing config:load:file:C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\npmrc Completed in 8ms
6 timing config:load:builtin Completed in 9ms
7 timing config:load:cli Completed in 9ms
8 timing config:load:env Completed in 3ms
9 timing config:load:file:C:\Users\gizmo\MagicMirror\.npmrc Completed in 2ms
10 timing config:load:project Completed in 5ms
11 timing config:load:file:C:\Users\gizmo\.npmrc Completed in 1ms
12 timing config:load:user Completed in 1ms
13 timing config:load:file:C:\Users\gizmo\AppData\Roaming\npm\etc\npmrc Completed in 1ms
14 timing config:load:global Completed in 2ms
15 timing config:load:validate Completed in 1ms
16 timing config:load:credentials Completed in 10ms
17 timing config:load:setEnvs Completed in 12ms
18 timing config:load Completed in 61ms
19 timing npm:load:configload Completed in 61ms
20 timing npm:load:setTitle Completed in 3ms
21 timing npm:load:setupLog Completed in 11ms
22 timing npm:load:cleanupLog Completed in 13ms
23 timing npm:load:configScope Completed in 0ms
24 timing npm:load:projectScope Completed in 4ms
25 timing npm:load Completed in 104ms
26 timing config:load:flatten Completed in 20ms
27 timing arborist:ctor Completed in 3ms
28 timing arborist:ctor Completed in 1ms
29 timing idealTree:init Completed in 122ms
30 timing idealTree Completed in 150ms
31 timing command:install Completed in 234ms
32 verbose stack Error: Invalid tag name "only=prod": Tags may not have any characters that encodeURIComponent encodes.
32 verbose stack     at invalidTagName (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\npm-package-arg\npa.js:94:15)
32 verbose stack     at fromRegistry (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\npm-package-arg\npa.js:299:13)
32 verbose stack     at resolve (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\npm-package-arg\npa.js:84:12)
32 verbose stack     at npa (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\npm-package-arg\npa.js:55:10)
32 verbose stack     at C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:474:50
32 verbose stack     at Array.map (<anonymous>)
32 verbose stack     at Arborist.[add] (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:471:28)
32 verbose stack     at Arborist.[applyUserRequestsToNode] (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:446:23)
32 verbose stack     at Arborist.[applyUserRequests] (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:402:43)
32 verbose stack     at Arborist.buildIdealTree (C:\Users\gizmo\AppData\Roaming\npm\node_modules\npm\node_modules\@npmcli\arborist\lib\arborist\build-ideal-tree.js:217:37)
33 verbose cwd C:\Users\gizmo\MagicMirror
34 verbose Windows_NT 10.0.18362
35 verbose argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\gizmo\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "only=prod"
36 verbose node v14.17.0
37 verbose npm  v7.14.0
38 error code EINVALIDTAGNAME
39 error Invalid tag name "only=prod": Tags may not have any characters that encodeURIComponent encodes.
40 verbose exit 1

@sdetweil npm 7.14.0 , node 14.17.0

@sdetweil yes i do

@sdetweil seems that in node_modules folder/.bin/ there’s not any electron.js

i’v also tried with cmd …

@airart it say

“node_modules” non è riconosciuto come come comando interno …

@sdetweil i edit like this

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

@sdetweil not working after edit package.json , i try to start on Win CMD with npm start ( folder MagicMirror)

did you manage to do what you wanted? I am in the same situation and I use a usb camera for motion detect
I would like the module with the clock to be full screen when no one is in front, then with the PS3 USB camera when someone is in front of the MM bring up all the modules.
I have already installed MMM-motiondetector