ok, sorry
osTicket Version 1.9.15
PHP Version 7.0.8-0ubuntu0.16.04.3
I follow this step:
Extract OST ZIP File
Open the extracted file and navigate to upload folder, then copy all the files to /var/www/html
sudo chown -R your-ubuntu-username-data /var/www/html
cp /var/www/html/include/ost-sampleconfig.php /var/www/html/ost-config.php
chmod 666 /var/www/html/include/ost-config.php
mv /var/www/html/index.html /var/www/html/index.html.orig
chmod -R g+s /var/www/html
find /var/www/html -type d -exec chmod 0755 {} \;
find /var/www/html -type f -exec chmod 0644 {} \;
Restart server Apache
when I Type http://192.168.x.x/setup/ appears HTTP ERROR 500