UNSOLVED npm start error

[costascontis]

After 3 days of mm uptime i rebooted my rpi and pm2 did not start mm.I run npm start and i get this error:

A JavaScript error occurred in the main process
Uncaught Exception:
Error: Cannot find module 'depd'
    at Module._resolveFilename (internal/modules/cjs/loader.js:602:15)
    at Function.Module._resolveFilename (/home/pi/MagicMirror/node_modules/electron/dist/resources/electron.asar/common/reset-search-paths.js:35:12)
    at Function.Module._load (internal/modules/cjs/loader.js:528:25)
    at Module.require (internal/modules/cjs/loader.js:658:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/home/pi/MagicMirror/node_modules/body-parser/index.js:14:17)
    at Object.<anonymous> (/home/pi/MagicMirror/node_modules/body-parser/index.js:159:3)
    at Module._compile (internal/modules/cjs/loader.js:711:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:722:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)

any ideas of what happened?

[Binog]

Do have the same problem after upgrade to 2.10.0.

Any hints?

[sdetweil]

Both do

cd ~/MagicMirror
npm install

You should not upgrade while mirror is running

Apparently neither used the upgrade script, right?