Error When Saving K2 Item | SOLVED

I did the QuickStart installation of the Momento Joomla template using J 3.5.0

Not sure why I am seeing this error when saving a K2 item [ see screen shot ] :

Clicking on it does not reveal anything extra NOR does opening each of the tabs show anything.


By the way … In my case, the only part I have attempted to edit is the name “Venice Beach”.

This is SOLVED now.

The Extra Fields tab needs some content and was not allowing me to save it.

Posting this link for reference also: