module not found error loading module in MagicMirror

[sdetweil]

@macg said in fix for black screen in 2.16 and later:

The “strange” referred to the fact that I have no problems with MMM-DWD-WarnWeather, but others have to install the module “request”.

did u npm install request in the mm folder, or in a module folder where there was no package.json, the latter ends up putting it in the mm/node_modules, the same as the former

[mumblebaj]

Maybe this can help some users.

The following will search all *.js files in the modules folder for the reference of request. You can then just enter the module folders and install as per @sdetweil suggestion above. The same can be done for the other missing modules.

grep -r -E '('request')' ~/MagicMirror/modules/*/*.js

or search for multiple problem modules

grep -r -E '('request') | ('valid-url')' ~/MagicMirror/modules/*/*.js

Produces the following:

[sdetweil]

@mumblebaj and then pull off the module name and scan it’s package.json to see if it’s referenced

[MacG]

@sdetweil said in fix for black screen in 2.16 and later:

did u npm install request in the mm folder, or in a module folder where there was no package.json, the latter ends up putting it in the mm/node_modules, the same as the former

I installed it the way you suggested. In the two module folders with the addition of package.json (npm init -y) and then npm install request. The MMM-DWD-WarnWeather worked on my mirror from the beginning after updating to MM2.17.

[sdetweil]

I enhanced my upgrade script to do all this for all installed modules…

[levon]

@sdetweil @mumblebaj Thank you two for helping me solve this problem after the last update - I spent a LOT of time looking for the solution that you two helped me (the grep made it easier to find the right modules), the two commands were what fixed it.

Will I have to do this again with the next update?

[sdetweil]

@levon maybe. but if you use my upgrade script, it will do the fixes for you

see
https://github.com/sdetweil/MagicMirror_scripts

[levon]

@sdetweil Thanks … I will give this a try next time I’m updating. I thought I had tried it before, but perhaps not. I appreciate you sharing this.

[Arena]

@sdetweil I did everything as you said, but …

[17.12.2021 04:05.03.723] [ERROR] WARNING! Could not load config file. Starting with default configuration. Error found: Error: Cannot find module ‘request’
Require stack:

• /home/pi/MagicMirror/modules/MMM-bitcoin/node_helper.js
• /home/pi/MagicMirror/js/app.js
• /home/pi/MagicMirror/js/electron.js
• /home/pi/MagicMirror/node_modules/electron/dist/resources/default_app.asar/main.js

[sdetweil]

@arena and , what is the module/library u need to install?

[Arena]

@sdetweil fiddled all day today and figured out
it turned out I did not install or update the dependencies inside the module

sorry, thanks

[kusselin]

@sdetweil Hello everyone, I haven’t been here for a while and my Magic Mirror was switched off…after I switched it on again I made updates to the modules via remote…but I still don’t have any display for some modules like Tankerkönig…when I start the Mirror it always says “Modules cannot be loaded”.

Now, as described by sdetweil, there are commands that you have to execute in the modules in question…but unfortunately I haven’t quite understood how I have to do this in the right order?

It would be really nice if you could explain to me how I have to proceed in order to display the modules again, such as Tankerkönig or mmm-fuel.

Thank you very much in advance for your help.

Greetings

Kussel

i don´t understand that here:

npm install ???

where ??? is the library noted in the message Cannot find module ‘???’

| in the example message above, ??? is request

to find this message, look in the output of npm start. or if you use pm2 to launch mm do
pm2 logs --lines=50

how do I proceed exactly?

pi@raspberrypi:~/MagicMirror/modules/MMM-Tankerkoenig $ npm init -y
Wrote to /home/pi/MagicMirror/modules/MMM-Tankerkoenig/package.json:

{
  "name": "MMM-Tankerkoenig",
  "version": "1.0.0",
  "description": "This is a module for the [MagicMirror²](https://github.com/MichMich/MagicMirror/) which displays a fuel prices from [Tankerkoenig](https://www.tankerkoenig.de/).",
  "main": "MMM-Tankerkoenig.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/terenc3/MMM-Tankerkoenig.git"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/terenc3/MMM-Tankerkoenig/issues"
  },
  "homepage": "https://github.com/terenc3/MMM-Tankerkoenig#readme"

[sdetweil]

@kusselin find the messages output by mm

search the messages for one like shown (without the ???)

find the name of the library in quotes (now u have ???)

issue a command using that info

[kusselin]

@sdetweil thank you…it´s working now.

[LMAC]

I ran the command as recommended (request was my error as well). I now have this error and MM will not load:

A JavaScript error occurred in the main process
Uncaught Exception:
Error: Cannot find module ‘logger’
Require stack:

• /home/pi/MagicMirror/js/app.js
• /home/pi/MagicMirror/js/electron.js
• /home/pi/MagicMirror/node_modules/electron/dist/resources/default_app.asar/main.js
• at Module._resolveFilename (node:internal/modules/cjs/loader:940:15)
  at Function.n._resolveFilename (node:electron/js2c/browser_init:249:1128)
  at Function.Module._resolveFilename (/home/pi/MagicMirror/node_modules/module-alias/index.js:49:29)
  at Module._load (node:internal/modules/cjs/loader:785:27)
  at Function.c._load (node:electron/js2c/asar_bundle:5:13331)
  at Module.require (node:internal/modules/cjs/loader:1012:19)
  at require (node:internal/modules/cjs/helpers:94:18)
  at Object. (/home/pi/MagicMirror/js/app.js:13:13)
  at Module._compile (node:internal/modules/cjs/loader:1116:14)
  at Object.Module._extensions…js (node:internal/modules/cjs/loader:1169:10)

[sdetweil]

@lmac well you ran it in the wrong place… oops

do this

cd ~/MagicMirror
rm -rf node_modules
rm package-lock.json
npm install

then for whatever module was causing problem

cd ~/MagicMirror/modules/modulename

do the same last 3 steps as above
AND THEN

npm install request --save

[DarrenHill]

Just wanted to say thanks for the fix here.

Did an update and hit exactly this with MMM-GmailFeed and the request module.

Installed it back (with an audit fix afterwards) and now all up and running again :)

[sdetweil]

@darrenhill said in fix for black screen in 2.16 and later:

with an audit fix afterwards

don’t do those… many times leave more trouble than they fix…
we can’t suppress the audit warning message

[DarrenHill]

@sdetweil OK, thanks for the pointer.

Always kinda worried when that style of message pops up, for security and suchlike.

I see from the update that my node is very much out of date, so now just backing things up before setting the update script onto it to try and bring that up too.

[sdetweil]

@darrenhill upgrade is for MM, not node, (altho it might do it, works sometimes, need to move to n) …

easiest is using the node version of nvm, called n

do

sudo npm i n -g
PATH="$PATH"
n 16 

then node 16 will be installed…

note that you will have to do another npm install in the mm (and maybe module folders)
this the upgrade would do (with force instead of apply)

n also allows you to SWITCH versions, or use a particular version for ONE app…
see n --help