Cannot call 'start' of undefined when star

Question

I get Cannot call 'start' of undefined when calling...

    Backbone.history.start()

When running some checks Backbone returns the object but Backbone.history returns undefined.

What could be the cause of this?

Thanks

Answer 1

Also using old versions of jquery could cause this

Answer 2

A similar error message ".. has no method 'start'" pops up if you write Backbone.History.start instead of Backbone.history.start (the correct one is with lowercase h in history).