Help with JWT Auth with Ember Simple Auth, Ember Simple Auth Token, and Knock on Rails Backend

Questions
7

This is the error I’m getting:

TypeError: (0 , _private.getOwner) is not a function
    at Class.serializerFor (ext.js:81)
    at Class.superWrapper [as serializerFor] (utils.js:350)
    at serializerForAdapter (-private.js:7097)
    at -private.js:7453
    at tryCatcher (rsvp.js:334)
    at invokeCallback (rsvp.js:507)
    at publish (rsvp.js:493)
    at rsvp.js:17
    at invoke (backburner.js:331)
    at Queue.flush (backburner.js:223)