API Integration Issue

We have to integrate CimFinance API with our site, Lifan, which is built on Wix.

Now the problem we are facing is that we have made a custom Component and in that custom component we have added a form and some input fields in one of those inputs fields we are passing our site’s URL as value and that will redirect the site to the given URL . But when we complete the process of loan Application it is not redirecting the site to the given URL and shows us the error of 403 Forbidden.

But if we change the URL and set any URL other than the sites that are built on Wix it is working fine.