Ember JS: define is not defined

I recently upgraded my app from Ember 1.3 to Ember 2.4.2. However after deploying it to my production environment with ember build --env production I noticed a couple of issues.

The first issue was that each script/stylesheet tag had a integrity attribute attached to it which made it impossible to load those resources. After some investigation I decided to just replace the value for those attributes to be empty. This allowed the app to download the resources but I then noticed an error in the console that said define is not defined on the minified website.js file that Ember creates. I'm unable to replicate this issue locally because the app runs fine. What steps can I additionally take to investigate this issue? Could this be related to some addon that I have installed, or maybe the SRI integrity attribute that I removed?