I found the problem - the template ONLY WORKS ON A NOT SUPPORTED, END OF LIFE PHP VERSION!!!
PHP 8.0 and above are supported and the template WILL NOT WORK with these versions. PHP 7.4 has been END OF LIFE beginning of the year and the last update date of March 2023 for this template clearly shows that the developers are 100% clueless what they are doing - 7.4 IS VULNERABLE, NOT SUPPORTED ANYMORE.
In the change log it says
Version 4.1 21 Mar, 2023
Task Support for Joomla 4.2.9
Bug Fixed PHP 8.1 compatibility issues
WHAT A FRIGGING LIE !!!! I tried ALL versions from 8.0 to 8.2 and NONE of these work with the template.
And to be perfectly clear, if ANY of the developers even did some BASIC testing, they would have seen the HUGE message in the control panel, that they have an EOL/UNSUPPORTED PHP version in use - OR THEY WOULD HAVE REALIZED THAT THEY DID NOT FIX ANYTHING IN THE TEMPLATE.
Last, but not least, neither K2 nor any event management modules are being installed with the quickstart. A complete clusterfuck.