Calendar widget

Hi Andrei,

With one of the more recent updates I noticed the Calendar Widget is not working anymore. The configuration is unchanged, but I see the spinner only and the following error in the console: 

TypeError: can't access property "join", r.l10n.weekdays.longhand is undefined

The widget works perfectly on PROD, but there the plugin version is older (0.13.7).

Any idea how I could make it work again?

Regards,

Dragos