Rag model examples - When uploading a sample ".pdf" file its producing an exception.

After using the playground for quite sometime, I shifted from one example to other example of RAG models. Later when I uploaded the same pdf into the knowledge base, its giving an exception. While the same file was working properly till then. Then I tried with different files all formats like ".txt", and ".md" each of these too failed with same exception as provided below.

Attached the sample file uploaded during testing.uploaded_Software Engineer Resume.pdf

RAGモデルの例を切り替え、添付されたPDFをアップロードして、playgroundで失敗を再現します。その後、報告されている.txtファイルと.mdファイルを試します。Issueに表示されている例外から始め、各形式のナレッジベースへのアップロードが正常に完了することを確認します。