Unsupported File Type Extension while Following Azure Exercise for RAG-based Solutions

Hey,

So I'm following along the exercise: https://learn.microsoft.com/en-us/training/modules/build-copilot-ai-studio/5-exercise

I downloaded the provided brochure.zip file, which only contains PDF files.

• I was able to successfully upload the brochure.zip as data in my AIHUB Foundry
• I created an index off of this data.

The index failed to create after about 5-10 minutes and complains with the following error message:

input_data=/mnt/azureml/cr/j/3780882ac51644ffb9d4a2905d7b30e9/cap/data-capability/wd/INPUT_input_data/brochures.zip    

num_embedded = create_embeddings(
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/tasks/embed.py", line 312, in create_embeddings
    for chunk in chunks:
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/tasks/crack_and_chunk_and_embed.py", line 218, in documents_to_embed
    for chunked_doc in chunked_docs:
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/documents/chunking.py", line 169, in split_documents
    for i, document in enumerate(documents):
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/documents/cracking.py", line 343, in crack_documents
    for i, source in enumerate(sources):
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/tasks/crack_and_chunk_and_embed.py", line 120, in sources_to_embed
    for source_doc in source_documents:
  File "/azureml-envs/rag-embeddings/lib/python3.9/site-packages/azureml/rag/tasks/crack_and_chunk.py", line 144, in filter_and_log_extensions
    raise Exception(
Exception: None of the provided file extensions are supported. List of supported file extensions is ['.txt', '.md', '.html', '.htm', '.py', '.pdf', '.ppt', '.pptx', '.doc', '.docx', '.xls', '.xlsx', '.csv', '.json']

This doesn't seem to make much sense to me since the .zip clearly contains supported file formats.