Update app.py

app.py

@@ -44,8 +44,9 @@ def download_pdf():
     print("Extracted PDF Link:", pdf_link)
     print("Extracted Keywords:", keyword)
     createDF=False
-    outputDone = Find_Hyperlinking_text.annotate_text_from_pdf([pdf_link], keyword)[0]
-
+    pdf_content = Find_Hyperlinking_text.annotate_text_from_pdf([pdf_link], keyword)[0]
+    if pdf_content is None:
+        return "PDF content not found.", 404
 
     pdf_bytes = BytesIO(pdf_content)
     return send_file(