Update app.py

app.py

@@ -103,7 +103,7 @@ async def upload_file(file: UploadFile = File(...)):
     Settings.embed_model = HuggingFaceEmbedding(model_name="WhereIsAI/UAE-Large-V1")
     # if vector_index is None:
     if not hasattr(app.state, "vector_index") or app.state.vector_index is None:
-        app.state.vector_index = VectorStoreIndex(nodes, embed_model=embed_model)
+        app.state.vector_index = VectorStoreIndex(nodes, embed_model=Settings.embed_model)
         message = "New vector index created and file stored."
     else:
         app.state.vector_index.insert_nodes(nodes)