The database maintenance script file is missing from the default installation folder.
Browse to the Active Administrator server installation folder.
Search for the file called AADBMaintenanceScript.SQL
Note: If Active Administrator was installed on a different drive, then browse to the installation folder on that drive, and copy the AADBMaintenanceScript.SQL to the Active Administrator Server installation folder.
If the file does not exist at all, Contact Support and they will provide a copy of this file.