Langsmith Playground: No generation chunks were returned

LangSmith Product Help
1

I am using langsmith playground to debug my prompt. I use OpenAI compatiable Endpoint, and set my apikey in browser. When I start running, I got error as below:

ValueError(‘No generation chunks were returned’)Traceback (most recent call last):
File “/usr/lib/python3.11/site-packages/langchain_core/runnables/base.py”, line 2383, in _atransform_stream_with_config
File “/usr/lib/python3.11/site-packages/langchain_core/runnables/base.py”, line 3443, in _atransform
File “/usr/lib/python3.11/site-packages/langchain_core/runnables/base.py”, line 5718, in atransform
File “/usr/lib/python3.11/site-packages/langchain_core/runnables/base.py”, line 1578, in atransform
File “/usr/lib/python3.11/site-packages/langchain_core/language_models/chat_models.py”, line 709, in astream
ValueError: No generation chunks were returned

PS:

  1. My base_url belongs to the company’s intranet.

  2. My api_key is definitely correct, because it works perfectly fine for me using the ChatOpenAI() SDK.

  3. I deploy a local server used “langraph dev“, get a studio to use langsmith playground

  4. this is my config:

    image
    image1324×1440 81.3 KB

What could be causing the request to fail?