Track opens stopped working recently. Clicking on tracked opens gnerates the following error message:
Fatal error: Class 'Database' not found in /home/xxxxxx/public_html/includes/bootstrap.inc on line 3462
The site is running:
- Drupal 7.53
- CiviCRM 4.4.20
- PHP 5.4.x
- MySQL 5.5.x
Any ideas or next steps for troubleshooting would be most appreciated.