WHMCS 8.1 not showing tickets

[executable77]

Hello,

 

I installed WHMCS in version 8.1.3 and when I try to access a ticket detail (supporttickets.php?action=view&id=1), I don't see any content on the page.

The error I'm getting on my browser console : 

Quote

Uncaught TypeError: Cannot read property 'split' of undefined

In file AdminTicketInterface.js

in the function loadTicketCcs()

on the following line : 

currentCcs = jQuery('#inputTicketCc').val().split(',');