I have a web request that i send to powershell

 Invoke-WebRequest -Uri $result

There should be a filed called “output” that has a number of fields.

I have tried the below

((Invoke-WebRequest -Uri $result) |ConvertFrom-Json) | Select-Object -ExpandProperty 
   output.Count

it says output.Count doesnt exist. output is returned as null. But if i do it in postman , output has values .

Why would this be happening ?