# Missing sources Module in Elastic Learn RAG Lab

**URL:** <https://discuss.elastic.co/t/missing-sources-module-in-elastic-learn-rag-lab/380722>\
**Category:** Elastic Training\
**Created:** [August 4, 2025, 1:25pm UTC](https://discuss.elastic.co/t/missing-sources-module-in-elastic-learn-rag-lab/380722 "2025-08-04T13:25:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sudhakara\_Gajula](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sudhakara_gajula/32/144468_2.png) [@Sudhakara\_Gajula](https://discuss.elastic.co/u/Sudhakara_Gajula)\
**Post date:** [August 4, 2025, 1:25pm UTC](https://discuss.elastic.co/t/missing-sources-module-in-elastic-learn-rag-lab/380722/1 "2025-08-04T13:25:40Z")

</div>

As part of the Elastic Learning Program, we are in the process of completing the training. While practicing the RAG application development in the provided lab environment, we encountered an issue — the `sources` module appears to be missing from the `apps/langchain-apps` directory.

Could you please assist us with this?

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/5/f/5fdc81cf1a6c201bf90bd8bec2112482a11c139d.png)