Please check either of the following are true:
1) The framework is one directory below the index.php
2) ".base_dir" exists in the same directory as the index.php
The framework must either exist below the public directory or you need to define a .base_dir that contains the real path to the framework.
The .base_dir file does exist with a path of: /home/customer/www/davidk98.sg-host.com/mangoweb
The current path is: /home/customer/www/dndgas.com/public_html/account
NOTE: Never put the framework in a public accessible directory as it would be insecure!