Install on Ubuntu ... Index of

Get Help
1

Hi !!
Sorry but my Engllish is not so good.
I trie to install Xibo ( 1.8.10 ) on my Ubuntu :

|Distributor ID:|Ubuntu|
|Description:|Ubuntu 18.04.1 LTS|
|Release:|18.04|
|Codename:|bionic|

I use apache2 with php7.2.
I tested to install with this link :

https://xibo.org.uk/manual/en/manual_install.html

But nothing, i have always, when i opening my local server, the index of of the folder.
Same of the extracted archive.

What i can do ??

Thanks for all !!