Error: Cannot find module '../lib/utils/unsupported.js' while using Ionic – Dev

The best answers to the question “Error: Cannot find module '../lib/utils/unsupported.js' while using Ionic” in the category Dev.


I always get this error message when I run “Ionic start project name”:

Error message

Running command - failed![ERROR] An error occurred while running npm install (exit code 1):

        throw err;

    Error: Cannot find module '../lib/utils/unsupported.js'
        at Function.Module._resolveFilename (module.js:469:15)
        at Function.Module._load (module.js:417:25)
        at Module.require (module.js:497:17)
        at require (internal/module.js:20:19)
        at /usr/local/lib/node_modules/npm/bin/npm-cli.js:19:21
        at Object.<anonymous> (/usr/local/lib/node_modules/npm/bin/npm-cli.js:79:3)
        at Module._compile (module.js:570:32)
        at Object.Module._extensions..js (module.js:579:10)
        at Module.load (module.js:487:32)
        at tryModuleLoad (module.js:446:12)


I followed the previous answers and reinstalled node. But I got this error.

Warning: The post-install step did not complete successfully You can
try again using brew postinstall node

So I ran this command

sudo chown -R $(whoami):admin /usr/local/lib/node_modules/

Then ran

brew postinstall node


Try to remove /usr/local/lib/node_modules/npm and reinstall node again. This should work.

On MacOS with Homebrew:

sudo rm -rf /usr/local/lib/node_modules/npm
brew reinstall node


On Mac OS X (10.12.6), I resolved this issue by doing the following:

brew uninstall --force node
brew install node

I then got an error complaining that node postinstall failed, and to rerun brew postinstall node

I then got an error:

permission denied @ rb_sysopen /usr/local/lib/node_modules/npm/bin/npx

I resolved that error by:

sudo chown -R $(whoami):admin /usr/local/lib/node_modules

And now I don’t get this error any more.


I received a similar error and now have it working.

First make sure you have the latest version

brew update

Remove your previous instance of node:

brew uninstall node

Then reinstall the latest version:

brew install node

And then make sure it is symlinked into /usr/local if it isn’t already. You would get an error to let you know to complete this step.

brew link --overwrite node 

More details on how to install/upgrade node are also available.