class 'NoneType' error for RetrievalQA

[huu3301]

Describe the bug
When I closed the button of "Return source Documents" on RetrievalQA component, the flow was successful but it raised error.

Browser and Version

• Browser: chrome
• Version: 123.0.6312.106
• langflow version: the latest version of dev branch in github (probably v1.0.0a12 version)

To Reproduce
Steps to reproduce the behavior:

1. Create components: TextLoader -> Recursive Character Text splitter -> OpenAI Embeddings -> FAISS
2. Create components: Chat Input -> Prompt
3. Create components: ChatOpenAI -> RetrievalQA -> Chat Output
4. Close the button of "Return Source Documents" on RetrievalQA

Screenshots
When I opened the button of "Return source Documents", the flow was successful and I got the result.

But if I closed this button, it raised error:
Error building vertex Retrieval QA: Invalid data type: <class 'NoneType'>.

[huu3301]

I know where is the bug:
In RetrievalQA.py, if return_source_documents is false, the result.get("source_documents") is None, this causes a bug in self.to_records function.

[anovazzi1]

Hello,
Sorry for the delay. Did you try using the new version? Does the error still persist?