You can find the error logs in a few different places:
In Plesk
- Login to Plesk
- Click on "Domains"
- Find the Domain you're looking for and click 'Open in Control Panel".
- Click "Websites & Domains"
- Click "Show Advanced Operations"
- Click "Logs"
- Here you will see all the logs for this site, you will want to click on "error_log"
In cPanel
- Login to cPanel
- Under the Logs submenu Click "Error Log"
SSH
If your SSH is directly to your server using Putty or another SSH client, you can find the logs at this location:
/var/www/vhosts/domainname.com/statistics/logs/
Create a MySQL database in Plesk
Login to Plesk Click "Websites & Domains" Click "Databases" Click "Add New Database"...