Submission Failure via REST Services

Hello, could you please help me?
I’m trying to bind KoboToolbox to my external api after inserting data via KoboCollect. My problem is that when I send my finalized form, the data is received in KoboToolbox but not the api REST service which returns an error: “Submission Failure… is not allowed”, the request keep pending and failed after.

Welcome to the community, @parkyu! Maybe you will also need to share your steps with the community so that the community should also be able to help you troubleshoot. You could make use of the screenshots to share your steps.

Hi @Kal_Lam Thank you for your advice, here are the results i get and the error too.