suitecrm in ubuntu18 ec2 instance port 80 error

hi i have problem while setup suitecrm in ec2 instance free tier …everything was fine till installation page for suitecrm then i got (Internal Server Error…Apache/2.4.29 (Ubuntu) Server at (IP entance ) Port 80..i treid to change configuration in sudo nano /etc/apache2/sites-available/suitecrm.conf but error still exit is there something should be changed or entance is not avilable with suitecrm i used this tutorial https://websiteforstudents.com/install-suitecrm-on-ubuntu-16-04-18-04-with-apache2-mariadb-and-php-7-2/ for setting up my instance

thanks