Error when serving: "Cannot read property 'contextualElement' of null" about ember-cli-fastboot HOT 6 CLOSED

version: 0.2.0-beta.1
Built project successfully. Stored in "dist".
DEBUG: -------------------------------
DEBUG: Ember      : 1.12.0-beta.1+canary.37b88c9e
DEBUG: Ember Data : 1.0.0-beta.15
DEBUG: -------------------------------
Ember FastBoot running at http://:::3000
TypeError: undefined is not a function
    at <anonymous>:149:30
    at Object.Backburner.run (<anonymous>:13764:27)
    at Object.run (<anonymous>:29516:27)
    at <anonymous>:148:19
    at tryCatch (<anonymous>:59081:16)
    at invokeCallback (<anonymous>:59093:17)
    at publish (<anonymous>:59064:11)
    at <anonymous>:40053:7
    at Queue.invoke (<anonymous>:14418:18)
    at Object.Queue.flush (<anonymous>:14483:13)
500 Unknown Error: TypeError: undefined is not a function
404 Not Found /favicon.ico
Error: Assertion Failed: The URL '/favicon.ico' did not match any routes in your application
    at new Error (native)
    at Error.EmberError (<anonymous>:25816:21)
    at Object.Ember.default.assert (<anonymous>:18505:13)
    at <anonymous>:37489:24
    at tryCatch (<anonymous>:59081:16)
    at invokeCallback (<anonymous>:59093:17)
    at <anonymous>:60992:13
    at <anonymous>:40053:7
    at Queue.invoke (<anonymous>:14418:18)
    at Object.Queue.flush (<anonymous>:14483:13)