Hello! I'll preface this by saying I have nearly no website experience and zero coding experience. I work for a small non-profit and I have inherited the responsibility of updating our website. I am trying to start editing/adding events on our website JEvents calendar. When I click on an event in "Manage an Event" or click "New" I get the following error:

An error has occurred.

0 [] operator not supported for strings

How do I fix this?