Scripts; Wizard Validator; Debug errors display when attempting to set the "focusControlId"

If a Wizard Validator Script fails validation and supplies a "focusControlId" (to make the wizard not move to the next page but instead, focus on a specific control) then this would function correctly but the Debug form would display an error similar to the following:

Failed to Focus Control 'numWithdrawalValue'

This error may occur multiple times.