Update app.py

app.py

@@ -122,7 +122,7 @@ def load_document(
 ) -> Document:
     # Choose loader from mapping, load default if no match found
     # ext = "." + uploaded_files.rsplit(".", 1)[-1]
-    ext = os.path.splitext(uploaded_file.name)[-1][1:].lower()
+    ext = os.path.splitext(uploaded_files.name)[-1][1:].lower()
     if ext in mapping:
         loader_class, loader_args = mapping[ext]
         loader = loader_class(uploaded_files, **loader_args)