[SOLVED] Cannot find module 'fs-extra' error when launching tests despite the module is present in cypress

Cannot find module 'fs-extra' error when launching tests despite the module is present in cypress

Just encountered the issue. After launching my tests this error appears in the cypress context window.

 Can't start server

The plugins file is missing or invalid.

Your pluginsFile is set to /Users/alexanderti/WebstormProjects/klickly-autotests-js/cypress/plugins/index.js, but either the file is missing, it contains a syntax error, or threw an error when required. The pluginsFile must be a .js or .coffee file.

Please fix this, or set pluginsFile to false if a plugins file is not necessary for your project.

Error: Cannot find module 'fs-extra'
    at Function.Module._resolveFilename (module.js:543:15)
    at Function.Module._load (module.js:473:25)
    at Module.require (module.js:586:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/alexanderti/WebstormProjects/klickly-autotests-js/cypress/plugins/index.js:51:12)
    at Object.<anonymous> (/Users/alexanderti/WebstormProjects/klickly-autotests-js/cypress/plugins/index.js:165:3)
    at Module._compile (module.js:642:30)
    at Object.Module._extensions..js (module.js:653:10)
    at Module.load (module.js:561:32)
    at tryModuleLoad (module.js:504:12)
    at Function.Module._load (module.js:496:3)
    at Module.require (module.js:586:17)
    at require (internal/module.js:11:18)
    at module.exports (/Users/alexanderti/Library/Caches/Cypress/3.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/plugins/child/run_plugins.js:118:15)
    at Object.<anonymous> (/Users/alexanderti/Library/Caches/Cypress/3.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/plugins/child/index.js:9:25)
    at Object.<anonymous> (/Users/alexanderti/Library/Caches/Cypress/3.4.0/Cypress.app/Contents/Resources/app/packages/server/lib/plugins/child/index.js:11:3)
    at Module._compile (module.js:642:30)
    at Object.Module._extensions..js (module.js:653:10)
    at Module.load (module.js:561:32)
    at tryModuleLoad (module.js:504:12)
    at Function.Module._load (module.js:496:3)
    at Function.Module.runMain (module.js:683:10)
    at startup (bootstrap_node.js:196:16)
    at bootstrap_node.js:622:3

Everything worked fine until I accidentally installed fs-exta module in package.json via UI prompt in Webstorm and then uninstalled it. Also removed ./node_modules and installed back. But the error remains.

I've checked modules availability via npm ls fs-extra and it shows that it present

─┬ cypress@3.4.0
│ └── fs-extra@5.0.0 
├─┬ mochawesome-merge@2.1.0
│ └── fs-extra@7.0.1 
└─┬ mochawesome-report-generator@4.1.0
  └── fs-extra@7.0.1

Solution

Fixed by re-installing node_modules directory but with package-lock.json deleted, perhaps because of this it was looking on old version. Now fixed