Index.php to be saved or opened when i want to open a website

Hello,

In a new server with Openmediavault 2.2.13, i want to install a software named Grr (http://grr.devome.com/en).
This software can manage meeting rooms or hardware like computers or video projectors.
I install the plugin Nginx and the plugin Mysql.
I choose port 81 to handle this website.
This configuration works like a charm in a old server.

But in this new server, when i open this website in Google Chrome or Internet Explorer, the file index.php wants to be saved or opened.

Can you help me to resolve this problem ?

Thanks in advance.

Bingo you're right.

By wanting to quickly install this server I forgot this setting.

Your advice and help are valuable.

Thanks a lot.

Have a good day.