Hello,
I have a custom REST ION API which acts as a SOAP wrapper and is working fine when tested in ION API:

It takes the following input. I tried adding this API to an ION API Connection Point with the following properties:

But when testing the API from the connection point, I add the input test xml that is shown above in ION API in the highlighted area:

However, I receive the following error:

Can anyone help with this?
Thanks,