mine does support SSE (https://github.com/mickael-kerjean/filestash) but it fails before getting there, with the log looking like this:

    2025/09/11 01:16:13 HTTP 200 GET    0.1ms /.well-known/oauth-authorization-server
    2025/09/11 01:16:13 HTTP 200 GET    2.5ms /
    2025/09/11 01:16:14 HTTP 404 GET    0.2ms /favicon.svg
    2025/09/11 01:16:14 HTTP 404 GET    0.2ms /favicon.png
    2025/09/11 01:16:14 HTTP 200 GET    0.2ms /favicon.ico
    2025/09/11 01:16:14 HTTP 200 GET    0.1ms /.well-known/oauth-authorization-server
    2025/09/11 01:16:15 HTTP 201 POST    0.3ms /mcp/register
    2025/09/11 01:16:27 HTTP 200 GET    1.4ms /

with the frontend showing: "Error creating connector" and the network call showing: { "detail": "1 validation error for RegisterOAuthClientResponse\n Input should be a valid dictionary or instance of RegisterOAuthClientResponse [type=model_type, input_value='{\"client_id\":\"ChatGPT.Dd...client_secret_basic\"}\\n', input_type=str]\n For further information visit https://errors.pydantic.dev/2.11/v/model_type" }