@peopleinside
You was getting 404 error because you created the helpdesk-project in a place in the server not loaded from Apache.
You need look into apache configuration for discover where Apache is pointing than move your helpdesk-project folder and content.
Now you are loading the folder.
Looks like you may have issue on managing a server and Apache so how you can install UVdesk?
Also when you load helpdesk-project you should see 403 forbidden while your server is showing all listed file. This can be a security issue and need to be fixed in Apache.
You need disable directory listening.
You can do a Google search on how to do, for example: https://stackoverflow.com/questions/2530372/how-do-i-disable-directory-browsing
You should be able to load UVdesk wizard by pointing to helpdesk-project/public.
Minimum PHP for the latest UVdesk is 8.0
Good luck 