karma start throws error

[walmik]

Running npm run karma or simply karma start, the following error is thrown:

27 09 2017 09:42:41.009:INFO [karma]: Karma v1.7.1 server started at http://0.0.0.0:9876/
27 09 2017 09:42:41.011:INFO [launcher]: Launching browser Firefox with unlimited concurrency
27 09 2017 09:42:41.018:INFO [launcher]: Starting browser Firefox
27 09 2017 09:42:43.229:INFO [Firefox 52.0.0 (Mac OS X 10.10.0)]: Connected on socket Cxr9nVgX9rdK8OxXAAAA with id 83739655
Firefox 52.0.0 (Mac OS X 10.10.0) Basic functions allows starting a timer in a given dom element FAILED
	TypeError: this.each is not a function thrown
Firefox 52.0.0 (Mac OS X 10.10.0): Executed 6 of 6 (1 FAILED) (0.01 secs / 0.035 secs)