While mapping Owner Id to From lookup field in Email, giving error as Invalid Argument

Hello, I'm facing problem while mapping Owner Id (User Ids from SFDC) field to 'From Lookup' in Email. Its giving error as Invalid Argument. However, while mapping same field to 'To lookup', 'Cc lookup', 'Bcc Lookup' there is no error. 

Error Details:

<ErrorDetails xmlns:d2p1="schemas.datacontract.org/.../System.Collections.Generic" />
<Message>The value passed for ConditionOperator.In is empty</Message>
<Timestamp>2017-07-14T09:26:00.7455695Z</Timestamp>
<InnerFault i:nil="true" />
<TraceText i:nil="true" />
</OrganizationServiceFault>

Please Assist !