Fix API connection issue Opencart

I am facing issues with API connection to Opencart. My app is in React Native. And the API endpoints are in Opencart platform. Now, here are a few points: - I tried the app with 2 different websites. For 1 website it is working but for the 2nd website it is not working which proves app code is correct. - Most of the times, the link is working but when POST params are sent, they are not readable by server. But it's working when the API is called through postman. Please start your bid with i can do it phase. If you have strong knowledge of Opencart and CORS (htaccess), then I think it's a small task for you. It need to be done within 2 hours now as it's really urgent.