ember-cli incompatible with addthis: Uncaught TypeError: e.slice is not a function

I just tried to include addThis to my ember application, but the addthis script cannot be loaded:

<script src="http://ift.tt/1KUN6KE" type="text/javascript"></script>

Wenn loading the script with my ember app loaded the script end up with a

Uncaught TypeError: e.slice is not a function

if I remove vendor.js from my site the addThis widget loads correctly.

I'm using:

DEBUG: -------------------------------
ember.debug.js:5227DEBUG: Ember             : 2.0.1
ember.debug.js:5227DEBUG: Ember Data        : 2.0.0
ember.debug.js:5227DEBUG: jQuery            : 1.11.3

Has anyone an idea what causes the incompatibility?