Warning showing after latest Events+ update

My main events page is showing the warning:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Eab_EventsHub' does not have a method 'enqueue_api_scripts' in /home/simplecs/public_html/unievents/wp-includes/plugin.php on line 505

On page: http://unievents.simplecsr.com/uni-events/

This page uses the shortcode: [eab_archive template="shortcode-archive-custom"]

Can you please advise about this error. It seems to be the only page with any error.

Many thanks
Chris