Wiki plugin – I'm unable to use the visual editor in the front end.

I’m unable to switch between the text and visual editors when editing a wiki. In the console, I’m getting this error:

Uncaught ReferenceError: switchEditors is not defined

I’ve tried the following with no luck:

– Checking and unchecking the ‘Disable visual editor…” box in my user settings

– Disabling all other plugins

– Installing ‘Use Google Libraries’ plugin, rebooting, etc.

– Opening in another browser

Any other ideas?