Unable to get the get link in Purchase Order

When i am trying to create an Purchase Order I am successfully able to create the purchase order using an API in the acumatica i have passed these fields in my body 
{

"Type": {"value": "Standard"}, "ReferenceNbr": {"value": "1"}, "Hold": {"value": false}, "VendorID": {"value": "PREMIUMVD"}, "Description": {"value": "Acumatica PO"}, "Date": {"value": "2023-03-27T00:00:00+05:30"}, "CurrencyID": {"value": "USD"}, "Location": {"value": "MAIN"}, "Terms": {"value": "T007"

} }
and i am getting the response as 200 where i am also getting an link 
 

When i am clicking the self link i am unable to get any thing and it is giving me this page 
 

Can anyone help me why i am getting this page