Ember - Path or pattern "vendor/ic-ajax/dist/named-amd/main.js" did not match any files

I have an ember app with ember-cli running perfectly on my MacBook Pro. Now I've installed ember on another MacBook Pro, downloaded the same git repo and ran ember s, which gives me this error trace:

compiler.js:17942:7)
    Walker.visit (/Users/Jensherf/shopstar-u/bower_components/ember/ember-template-compiler.js:17910:12)
    visitors.Program (/Users/Jensherf/shopstar-u/bower_components/ember/ember-template-compiler.js:17919:16)
Path or pattern "vendor/ic-ajax/dist/named-amd/main.js" did not match any files
Error: Path or pattern "vendor/ic-ajax/dist/named-amd/main.js" did not match any files
    at Object.multiGlob (/Users/Jensherf/shopstar-u/node_modules/broccoli-kitchen-sink-helpers/index.js:203:13)
    at Class.module.exports.CachingWriter.extend.addFiles (/Users/Jensherf/shopstar-u/node_modules/broccoli-sourcemap-concat/concat-with-maps.js:74:13)
    at Class.module.exports.CachingWriter.extend.updateCache (/Users/Jensherf/shopstar-u/node_modules/broccoli-sourcemap-concat/concat-with-maps.js:52:12)
    at /Users/Jensherf/shopstar-u/node_modules/broccoli-sourcemap-concat/node_modules/broccoli-caching-writer/index.js:92:34
    at lib$rsvp$$internal$$tryCatch (/Users/Jensherf/shopstar-u/node_modules/rsvp/dist/rsvp.js:489:16)
    at lib$rsvp$$internal$$invokeCallback (/Users/Jensherf/shopstar-u/node_modules/rsvp/dist/rsvp.js:501:17)
    at lib$rsvp$$internal$$publish (/Users/Jensherf/shopstar-u/node_modules/rsvp/dist/rsvp.js:472:11)
    at Object.lib$rsvp$asap$$flush [as _onImmediate] (/Users/Jensherf/shopstar-u/node_modules/rsvp/dist/rsvp.js:1290:9)
    at processImmediate [as _immediateCallback] (timers.js:345:15)

In this output, the sentence "Path or pattern "vendor/ic-ajax/dist/named-amd/main.js" did not match any files" is in red.

I cannot figure out how to fix this. Why would the app be looking in the vendor/ folder for this library? Shouldn't it be in bower components or node modules? Does anyone have an idea what should be in this file?

Here is my .gitignore file just for completeness:

# See http://ift.tt/Vpfznc for more about ignoring files.

# compiled output
/dist
/tmp

# dependencies
/node_modules
/bower_components

# misc
/.sass-cache
/connect.lock
/coverage/*
/libpeerconnection.log
npm-debug.log
testem.log