First, I need to clarify, I am not a php expert. I only try to set it up as a general test.

I cloned following code:
https://github.com/HAWK-Digital-Environments/HAWKI

I downloaded XAMPP and put the code into the XAMPP htdocs folder.

I started the XAMPP server.

If I try to open the project locally with the following link, it redirects to the login page as defined in the index.php. But I receive the error that the object was not found:
http://localhost/hawki

If I enter the following link, I receive the same error:
http://localhost/hawki/login

How to I solve the problem and get it running?
Normally, it should work like this page:
https://ai.hawk.de/login.php