Under the Params > Path Variables 'switch' should be in the key and nothing in the value (Postman will have a light grey 'Value' in the cell). If anything is in the cell, even a space, the :switch in the url will be replaced with that value.
You can look in the console and see the call. Make sure it looks like "POST https://api.extremecloudiq.com/account/:switch?id={XXX}"
If the :switch is missing, I would delete the end of the url and retype ':switch?id={XXX}'