n2 is not defined (WordPress)

Possible errors in Console
  • n2 is not defined 
  • NextendSmartSliderSimple is not defined 
  • N2Require is not defined
  • N2Classes.SmartSliderSimple is not a constructor

This error can happen, when the jQuery is called in from the footer, and not from the header (probably you are using a custom theme). You should turn on the Async option at the Nextend Settings for the JavaScript files. That will make our code to wait until the jQuery is loaded, and it will run only after it. If this won't help, check out this.