Could not evaluate condition in rule: DBO - Total IC Load Baseline on severity level: Critical (4249717)

The following message was logged every hour in the Foglight Server's mangement logs

YYYY-MM-DD HH:MM:SS WARN [TimeDriven_Worker-7] com.quest.nitro.service.rule.rule.Rule - Could not evaluate condition in rule: DBO - Total IC Load Baseline on severity level: Critical. Reason: com.quest.nitro.service.sl.interfaces.scripting.ScriptAbortException: script1000089: java.lang.NullPointerException: Cannot invoke method replaceAll() on null object
com.quest.nitro.service.sl.interfaces.scripting.ScriptingException: com.quest.nitro.service.sl.interfaces.scripting.ScriptAbortException: script1000089: java.lang.NullPointerException: Cannot invoke method replaceAll() on null object
at com.quest.nitro.service.scripting.ScriptingService.invoke(ScriptingService.java:612)
at com.quest.nitro.service.rule.expression.Expression.evaluate(Expression.java:116)