Fix LlamaIndex SimpleDir

app.py

@@ -83,7 +83,7 @@ def load_llamaindex_stack(model_id: str, max_new_tokens: int, temperature: float
     #Settings.llm = llm
 
     # Load small docs (data/notes.txt)
-    docs = SimpleDirectoryReader(input_dir=["data"]).load_data()
+    docs = SimpleDirectoryReader(input_dir="data").load_data()
     index = VectorStoreIndex.from_documents(docs)
     query_engine = index.as_query_engine(similarity_top_k=3)
     return query_engine