Does the hotel template work with Joomla 3.9.x with PHP 7.3 and above, I ask because when I installed the template using the QS and then update the PHP to 7.3 or above, the site does not load, so I am wondering if the template or one of the components installed during the quickstart is causing the issue.

Thanks in advance.

Hello,
the theme itself is working with PHP 7.3 as well. Maybe you should update the roksprocket module to the newest version.
Therefore please follow the update instructions in your Joomla.