Property Selection INCORRECT in dynamic content -Logic app Azure

Question

I am writing a logic app. My schema looks like below.

i am able to select the dynamic content at each step. I am have 4 "for each" operations for the 4 arrays.

However when i test through postman , i get the error at " for each " step. "InvalidTemplate. Unable to process template language expressions for action 'For_each_items' at line '1' and column '1710': 'The template language expression 'triggerBody()?['Data']?['Orders_items']' cannot be evaluated because property 'Data' cannot be selected. Property selection is not supported on values of type 'String'. Please see https://aka.ms/logicexpressions for usage details.'"

Answer 1

I think when you use postman to test, you need to select the body type as json：