Condensepluscontext

This chat mode is already condensing a new question based on your new query and previous chat history.
You need to check the response object, it is present inside that

If you want to generate more, you can check questionGenerator module: https://docs.llamaindex.ai/en/stable/examples/evaluation/QuestionGeneration/?h=question

Thank you, it would be great if it's available in the response. Which part of this response does it belong to? Can you give me an example?

You'll find it under sources

I use print(str(response.sources)) and it only shows the content within ToolOutput. But I don't see any new questions being generated.

Yes under ToolOutput object you are getting raw_input={"message": condensed_question}, In this you'll find updated question based on your question.
Do note it will not show updated question in the first run , it will start modifying the question when it has a chat history.

I find it more like an answer rather than a question.

No it is a question only, formed based on your chat-history

I asked about error E1, and in the provided data, after receiving the answer, the raw_input data looks like this:

My chat_engine:
chat_engine = CondensePlusContextChatEngine.from_defaults(
retriever,
llm=llm,
context_prompt=prompt_tmpl,
verbose=False,
chat_history=custom_chat_history,
condense_prompt=condense_prompt,
node_postprocessors=[node_postprocessor],
skip_condense=False,
callback_manager=callback_manager
)

response.sources[0].raw_input

{'message': 'Error E1 is often related to problems during device operation. Please check the power connection and related devices.'}