SASS Issue - libsass bindings not found

The following error keeps showing up now:
ionic $ /APP/node_modules/gulp-sass/node_modules/node-sass/lib/index.js:22
throw new Error(’libsass bindings not found. Try reinstalling node-sass?’);
^

Error: libsass bindings not found. Try reinstalling node-sass?
at getBinding (/APP/node_modules/gulp-sass/node_modules/node-sass/lib/index.js:22:11)
at Object. (/APP/node_modules/gulp-sass/node_modules/node-sass/lib/index.js:188:23)
at Module._compile (module.js:409:26)
at Object.Module._extensions…js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (/APP/node_modules/gulp-sass/index.js:3:17)
at Module._compile (module.js:409:26)

System Information:
Cordova CLI: 6.1.1
Gulp version: CLI version 1.2.1
Gulp local: Local version 3.9.0
Ionic Version: 1.1.0
Ionic CLI Version: 1.7.14
Ionic App Lib Version: 0.7.0
ios-deploy version: 1.8.5
ios-sim version: 5.0.8
OS: Mac OS X El Capitan
Node Version: v4.4.2
Xcode version: Xcode 7.3.1 Build version 7D1014

This error has come about suddenly and I have tried various ways to fix this, including:
reinstalling node-sass
updating node (that breaks many more things, so reverted back to 4.4.2)

What could be other possible solutions to fix this problem?

Just fought through that issue. Look at the package.json file for the app you are working on. Update the packages to the latest revs. My gulp-sass was referencing a very old version.

To locate the current version of a package, just go to npm and search for the package by name. The version is listed along the right hand side of the page.

Then delete the node_modules folder and run npm install. This should reassemble the packages with the correct dependencies.

Good luck

Chris