Nodejs app doesn't run with pm2

In my situation, I also met pm2 errored:

internal/modules/cjs/loader.js:1068
  throw err;
  ^

Error: Cannot find module './config'
Require stack:
- /usr/my/express/js/app.js
- /usr/my/express/js/bin/www
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:1065:15)
    at Function.Module._load (internal/modules/cjs/loader.js:911:27)
    at Module.require (internal/modules/cjs/loader.js:1125:19)
    at require (internal/modules/cjs/helpers.js:75:18)
    at Object.<anonymous> (/usr/my/express/js/app.js:9:16)
    at Module._compile (internal/modules/cjs/loader.js:1236:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1257:10)
    at Module.load (internal/modules/cjs/loader.js:1085:32)
    at Function.Module._load (internal/modules/cjs/loader.js:950:14)
    at Module.require (internal/modules/cjs/loader.js:1125:19) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/usr/my/express/js/app.js',
    '/usr/my/express/js/bin/www'
  ]
}
[nodemon] app crashed - waiting for file changes before starting...

As you can see above, I lost my ./config file, because I added it into .gitignore and when I cloned it on local machine, it lost.

Just retrieve the file back, and the problem solved!

Hi, i am struggling with the same problem. my log error is below. Please advise where to go from here. Thanks in advance:

/root/.pm2/logs/server-error.log last 15 lines:
0|server   | Require stack:
0|server   | - /var/www/api.diegotrainer.com/html/dt-express-backend/server.js
0|server   |     at Function.Module._resolveFilename (internal/modules/cjs/loader.js:965:15)
0|server   |     at Module.Hook._require.Module.require (/usr/lib/node_modules/pm2/node_modules/require-in-the-middle/index.js:61:29)
0|server   |     at require (internal/modules/cjs/helpers.js:72:18)
0|server   |     at Object.<anonymous> (/var/www/api.diegotrainer.com/html/dt-express-backend/server.js:120:32)
0|server   |     at Module._compile (internal/modules/cjs/loader.js:1137:30)
0|server   |     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
0|server   |     at Module.load (internal/modules/cjs/loader.js:985:32)
0|server   |     at Function.Module._load (internal/modules/cjs/loader.js:878:14)
0|server   |     at Object.<anonymous> (/usr/lib/node_modules/pm2/lib/ProcessContainerFork.js:32:23)
0|server   |     at Module._compile (internal/modules/cjs/loader.js:1137:30) {
0|server   |   code: 'MODULE_NOT_FOUND',
0|server   |   requireStack: [ '/var/www/api.diegotrainer.com/html/dt-express-backend/server.js' ]
0|server   | }