I cant İnstall platform on ubuntu 18.04

I installed your system for ubuntu 18.04. Setuped db configuration on the web. But i cant login system.
I write login information and system redirect to /users/defaults page. But server not found this page. Please help me.

Hello,

Clean you cache and install

cd /etc/apache2/mods-available
a2enmod rewrite

in /etc/apache2/apache2.conf add the line below:

<Directory /var/www/autovm/>
Options Indexes FollowSymLinks
AllowOverride All
Require all granted
</Directory>

Thank u but. I am using nginx.

Your nginx configuration is not correct.
You must rewrite all requests to the index.php file.