Hello,
Try to activate the rewrite mod of apache and create a virtualhost.
such as
<VirtualHost *:80>
ServerName sub.domain.tld
DocumentRoot "/var/www/Phraseanet/www"
<Directory "/var/www/Phraseanet/www">
DirectoryIndex index.php
Options Indexes FollowSymLinks
AllowOverride All
</Directory>
</VirtualHost>
Your can also dowload the Phraseanet virtualbox VM from https://www.phraseanet.com/builds/vm/vm_ovf1_vmdk_phraseanet40_rc_20170410.zip
Best regards