Update app.py

app.py

@@ -12,7 +12,7 @@ from llama_index.core import (
     Settings,
 )
 from llama_index.llms.huggingface import (HuggingFaceLLM, HuggingFaceInferenceAPI, )
-from llama_index.core.llms.types import ChatMessage
+from llama_index.core.base.llms.types import ChatMessage
 from huggingface_hub import login
 import chromadb as chromadb
 from chromadb.utils import embedding_functions