https://docs.contao.org/4.x/manual/en/installation/system-requirements/To run Contao successfully, the web server must meet these system requirements. Contao was originally developed for the familiar LAMP stack, but runs on any web server that provides a current version of PHP and MySQL. Note If you use the Contao Manager to install and update your Contao instances, you should also note its System requirements. Software Recommendations The minimum requirements depend on whether you are installing the latest or the Long Term Support version. All maintained versions of Contao are compatible with the latest PHP and MySQL versions. Therefore, we recommend to always use them.Hugoen