Issue with KB indexing and Smart Solver blocking (Windows 10, KB-only setup)

[soukahak]

Hello,

I am currently testing DeepTutor on Windows 10 and I am facing a blocking issue
related to Knowledge Base indexing and Smart Solver behavior.

Context:

• DeepTutor installed and running correctly (backend + frontend).
• Knowledge Base is created and visible in the UI.
• PDF parsing via MinerU/RAGAnything consistently blocks on Windows.
• As a workaround, I switched to TXT-based ingestion.

Problem:

• Running start_kb init with TXT completes without errors,
  but no JSON chunks are generated in content_list/,
  so LightRAG is not properly initialized.
• As a result, Smart Solver:
  • cannot find enough KB content,
  • reaches max iterations,
  • sometimes triggers RateLimitError,
  • and blocks the UI until page refresh.

Additional context:

• Web search is fully disabled (intended KB-only usage).
• Goal is a strict educational setup: answers must rely only on KB,
  otherwise explicitly refuse to answer.

Questions:

1. Is there a recommended way to reliably initialize LightRAG on Windows
   without MinerU/PDF parsing?
2. Is manual creation of content_list JSON chunks a supported workaround?
3. Is there a configuration to force Smart Solver into strict KB-only mode
   and stop the reasoning loop when KB content is insufficient?

Any guidance would be greatly appreciated.
Thank you for your work on DeepTutor.