Hi， I am implementing Workforce Analytics on Hana but it always shows not Validated when edit formula. it always shows the error"InvalidString reference not set to an instance of a String. Parameter name: s"

Hi，I am implementing Workforce Analytics on Hana but it always shows not Validated when edit formula.it always shows the error"InvalidString reference not set to an instance of a String.Parameter name: s"@sorenhojby @former_member18089 @Marie_Mayoros...