Same issue here. I am serving my api with FastAPI. My plugin.json and openapi.json are properly served and validated. I loaded my plugin into the browser, and when it sends a request it tries to use HTTPS which my local server rejects. I have validated that my server works fine if i call the endpoint myself using HTTP. This seems like an error on OpenAI’s end, as i dont see a way to specify in a config somewhere that it should use http and not https.