When accessing the database agent alarms dashboard the retrieving agent setting popup hangs (4251397)

When accessing the Alarms dashboard in Global Administration, the "retrieving agent settings" popup stops at 0% for the Oracle instance and at 23% for the SQL Server instance.

The FMS logs show the following error:

ERROR [cspnkhnrkn:1836292656134450104444289] com.quest.wcf.core.module.function.FunctionManager - Error executing script id=system:Dbwc_Common_Oracle_GA_Common_Frames_alarmsscreen.19 name="'Get emailMessageDetails' from the System module Databases/Dbwc_Common_Oracle/Global Administration/Common Frames/Alarms Screen"
message: com.quest.nitro.service.sl.interfaces.scripting.ScriptingException: com.quest.nitro.service.sl.interfaces.scripting.ScriptAbortException: java.lang.ArrayIndexOutOfBoundsException: 1
----script start------
alarmName Common:String
adminKey Common:Number
agentList Common:List of Strings
screenType Common:String

Output:
Data Type Dbwc_Common_Oracle_GA_Alarm_MsgDetails

The global default values of the DBSS and DBO registry variables have been set to an empty string.

Set the global default values of all affected DB cartridges to "unset":

1. Go to Administration | Rules & Notifications | Manage Registry Variables.
2. Look for the DBSS and / or DBO registry variables whose "global default" values is blank.
3. Click on the registry variable | select "View and Edit Details".
4. Click the "Remove" button for the "Global Default" value.