Update to Meteor 1.5.2.2 Failing (TypeError: Path must be a string. Received undefined)

After updating to the new security fixes found in version Meteor 1.5.2.2 my application now fails to load. When I run ‘meteor’ to bring up the app I get the following errors:

meteor --settings settings-dev.json
[[[[[ ~/Sites/app.s2h ]]]]]

=> Started proxy.
/Users/darren/.meteor/packages/less/.2.7.9.1fjsu30++os+web.browser+web.cordova/plugin.compileLessBatch.os/npm/node_modules/meteor/promise/node_modules/meteor-promise/promise_server.js:190
throw error;
^
TypeError: Path must be a string. Received undefined

When I revert back to previous version of meteor everything runs fine. Anyone else experiencing something similar?