Not able to connect websocket api in Grafana 12.0.1

Currently I am use the Garfana 12.0.1 version

I write api in python fastapi framework. And api is working fine in postman but when I try to connect that same api with grafana webscoet api plugin it will give me an error.

Can this plugin support in garafana 12.0.1 version or any specific data format it will support ? 