Could someone explain this error to me, pleas...

[Michael2]

Could someone explain this error to me, please? All referenced fields are base type text. Attempting to use this expression in a workflow…

Error msg: IFS function is used incorrectly:Inputs to IFS() must be condition-value pairs. Input 6 is not a value of a consistent type.

Expression: IFS([StructureID].[Insulator_Type]=“Porcelain”,[PorcelainCondition], [StructureID].[Insulator_Type]=“Polymer”,[PolymerCondition], [StructureID].[Insulator_Type]=“PolymerAndPorcelain”,“Replace All Insulators”)