ERROR: Unhandled system exception: Could not create an instance of type MetaDataDefinition.Revisions.R1.ReadOnly.IFieldMetaData. Type is an interface or abstract class and cannot be instantiated. Path 'ReferencedFields.{relationshipName}.Annotations', li

Version 1

    Details

     

    Trying to add field to a form. Upon clicking save the following error is shown:

    Unhandled system exception: Could not create an instance of type MetaDataDefinition.Revisions.R1.ReadOnly.IFieldMetaData. Type is an interface or abstract class and cannot be instantiated. Path 'ReferencedFields.{relationshipName}.Annotations', line 1, position 183094.

    The Relationship name and field shown may vary.

     


    Resolution

    One possible scenario uncovered by support that can cause this is an expired session that causes the AdminUI to throw this error when attempting to save an update to a form.  Renewing the user session by logging out and logging back in can resolve this error.