Make the file version changes in upload/include/client/header.inc.php

The version in the file names being called just need to be changed on line 58 and 59

<script type="text/javascript" src="<?php echo ROOT_PATH; ?>js/jquery-3.5.1.min.js?ca95150"></script>
<script type="text/javascript" src="<?php echo ROOT_PATH; ?>js/jquery-ui-1.13.1.custom.min.js?ca95150"></script>

To

<script type="text/javascript" src="<?php echo ROOT_PATH; ?>js/jquery-3.6.3.min.js?ca95150"></script>
<script type="text/javascript" src="<?php echo ROOT_PATH; ?>js/jquery-ui-1.13.2.custom.min.js?ca95150"></script>

Hi guys, 

I'm sorry that I've been unavailable for a while.

And I agree, this is a terrible mistake.

I'm really pleased that you managed to work out your own solution.

For anyone else that is reading this, upgrade to the latest hotfix (osTicket-1.17.3-Awesome-102) or (recommended) simply open /include/client/header.inc.php and replace its contents with this code.