If you find Review system database error like this
It happen because there's a conflict between your Hosting Server and Youzer Reviews System. Please do these steps to fix it
1. Go to FTP/Cpanel, and go to folder "wp-content/plugins"
2. Create a file and name it with "bp-custom.php" file (if you already have it, please just open it. No need to create a new file one)
3. Put this snippet on the file and save
4. Clear your browser cache and test again. The error will be solved then.
5. Please remove the snippet from the bp-custom.php after the problem solved.