Could not find rates with multiple parcels

Hi there, hope you are doing great. I am using Easyship API to get rates and create shipment, but I am facing an issue related to rates API.

Whenever I send request with multiple parcels, I receive this kind of response,{"status":"failure","errors":["Sorry, we couldn't find any shipping solutions based on the information provided."],"request_id":"20a212fa-b873-4d20-b5a2-50b8c43201f4"}. But this works fine and return rates, if I send requests with the same information with only one parcel.

I am using PHP Crul to send requests. I also attached a file so you can check what the issue is, maybe there is something missing in my request. I have tried many combinations of information but the response is the same with multiple parcels.

I already send a request(285846), in which I have attached my code file.

Thank you
Qasim Rafique