[Windows] UI stuck loading when running A2A LangGraph example

I encountered an issue when running the A2A LangGraph example on Windows.

The agent itself runs fine.


However, when starting the UI, it gets stuck at the loading screen.



Yesterday, I managed to get the UI to display, and I could add the LangGraph agent, but during conversations, the progress bar entered an infinite loop and no response was received.

Environment:

OS: Windows

Example: A2A LangGraph example

Please let me know if you need more details or logs. Thanks a lot for your help!