Pusing data to a REST endpoint

I have a kobotoolbox instance running on my server.
I have a form. Under the REST services, I have configured an endpoint. The endpoint does not require any form of authentication.
I have submitted data to this form and I expected the data to automagically be submitted to the endpoint. It did not.
The endpoint is also domiciled on the same host as the kobotoolbox.

How do I troubleshoot and fix this?

TIA.

@odhiambo, have you tried this on the public server to see how it behaves?