Task "sass:dev" not found.

 "name": "electron-release-server",
  "version": "1.4.2",

npm start

Task “sass:dev” not found.

debug: -------------------------------------------------------
debug: :: Thu Dec 15 2016 09:54:00 GMT+0800 (CST)

debug: Environment : development
debug: Port        : 1337
debug: -------------------------------------------------------

error: ** Grunt :: An error occurred. **
error:
------------------------------------------------------------------------
Aborted due to warnings.
Running "wiredep:task" (wiredep) task
Warning: Task "sass:dev" not found.
------------------------------------------------------------------------

error: Looks like a Grunt error occurred--
error: Please fix it, then **restart Sails** to continue running tasks (e.g. watching for changes in assets)
error: Or if you're stuck, check out the troubleshooting tips below.

error: Troubleshooting tips:
error: 
error:  *-> Are "grunt" and related grunt task modules installed locally?  Run `npm install` if you're not sure.
error: 
error:  *-> You might have a malformed LESS, SASS, CoffeeScript file, etc.
error: 
error:  *-> Or maybe you don't have permissions to access the `.tmp` directory?
error:      e.g., `/home/github/electron-release-server/.tmp` ?
error: 
error:      If you think this might be the case, try running:
error:      sudo chown -R YOUR_COMPUTER_USER_NAME /home/github/electron-release-server/.tmp

[johniw]

For those people whom reinstalling didn’t do the trick, try running npm rebuild node-sass . As detailed here, rebuilding fixed the issue : https://github.com/sass/node-sass/issues/1527

[zjfjiayou]

I use rebuild node - sass and solved the problem，ths ArekSredzki