在通过 Streamlit 的 Starlette 运行时出现 OTEL 中间件异常,但不通过 Uvicorn 直接运行

1. Install

$ Python --version
Python 3.14.7
$ pip install streamlit opentelemetry-sdk opentelemetry-instrumentation-starlette
$ streamlit --version
Streamlit, version 1.62.0

1. Toggle+run the example code path (A) to see the Streamlit error vs (B) to see the working Starlette/Uvicorn.