Depending on how you unzip and were you placed it in /var/www/ may be the problem. there should be index.php in /var/www/html to load RPintsI'm thinking there needs to be a file at /var/www/html/ location that is for Raspberry Pints but I'm not sure.
Most people use my version as it works with the latest PHP and Pi OS.Is there a newer version everyone is going off of or can someone let me know if I might be missing something?
to install simply run
curl -L install.rpints.com | sudo bash
that will download and run an installation script i created that walks you through installation and ask what version to install. it is recommended to install mine or Tobor's version. Mine has a lot more features the the original and is being updated. Tobor's is the original recoded for the latest PHP.