I need a JCal Pro Calendar .php error fixing on a Joomla website

I have an error come up on my Joomla website, within the JCal Pro Calendar. There is a constant error on the home page of the site which is (screen shot attached): Warning: strtoupper() expects parameter 1 to be string, array given in /home/ysmys/public_html/libraries/joomla/environment/request.php on line 97

There is also an error when you go to view full calendar of events, scree shot attached.

Need this doing within the next 5-7 days.

Look forward to your proposals detailing experience.

Thanks You

Taf