XenForo core.js Uncaught TypeError: this.initialize is not a function

[Whistle]

I'm getting this error on the server. It works fine on localhost.

Code:

Uncaught TypeError: this.initialize is not a function
    at Object.refresh (core.js?_v=a432eefa:6502:10)
    at Object.activate (core.js?_v=a432eefa:2144:19)
    at fn.__construct (core.js?_v=a432eefa:7745:7)
    at new fn (core.js?_v=a432eefa:3985:9)
    at core.js?_v=a432eefa:8027:21
    at core.js?_v=a432eefa:2439:20
    at markFinished (core.js?_v=a432eefa:5537:6)
    at core.js?_v=a432eefa:5558:6
    at...

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