2696032 - Rule Definition Error : "This rule contains errors, which are highlighted in the rule details. Please correct them" : Post 1808 Release

Post 1808 release Business rules are broken in customer's instance with error message:

"Rule Definition error - This rule contains errors, which are highlighted in the rule details. Please correct them"

• This occurs with rules that have a "Raise Mesage" on then statement
• Upon checking the Message on Manage Data -> Message definition, the Message is active
• There were no recent changes made to the rule nor the Message Definition
• Upon selecting "Edit Rule" and reselecting the same Message fixes this Error 

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

SAP SuccessFactors Employee Central - b1808

SF, EC, Success factors, Employee Central, XAF-26008 , KBA , LOD-SF-EC-RUL , DO NOT USE - Business Rules & Event Derivation , Problem