Hello! Have you followed the installation guide? You can find it here: https://minthcm.org/support/minthcm-installation-guide/
Also, please check the log files of minthcm, PHP, and database. Do you see any errors there?
Remember, that to enable the installation process, you need to set up the .htaccess file correctly. The index.php script does the following steps to help with installation:
Creates the .htaccess file.
Moves the index.html file.
Removes the index.php file.
You can follow the same steps manually.
For detailed instructions, check this file: https://github.com/minthcm/minthcm/blob/master/index.php