Fix wss:// Secure Websocket Connectivity

I Have An Nginx Server And I Have Hosted A Websocket On It. But I Need To Secure My Websocket.
I Have Hosted My Domain On Cloudfare and AWS .
when i connect my websocket
wss://socket.metafuture.trade

the websocket is working in postman but not working in my javascript code.
it shows CERT AUTHORITY INVALID

I Need Only An Experienced Person To Solve This Issue