I'll upgrade. The install instructions said to use PHP 7.4 or newer.

I'm trying to create my instance of Uvhelpdesk from the downloaded zip file.
uvdesk-community-current-stable.zip

I'm on ubuntu 20.04 and php7.4

I am getting several errors, the first is:

In XmlFileLoader.php line 407:

Unable to parse file "/home/uvdesk/workstation/www/vendor/doctrine/doctrine-bundle/DependencyInjection/../Resources/con
fig/dbal.xml": The XML file "/home/uvdesk/workstation/www/vendor/doctrine/doctrine-bundle/DependencyInjection/../Resour
ces/config/dbal.xml" is not valid.

A previous run of configure-helpdesk indicated I needed DOM. Maybe I installed DOM wrong?
Am I missing a dependency?

Thanks - Dean