Model issue is resolved

app.py

@@ -8,7 +8,7 @@ import os
 
 prompt = ChatPromptTemplate.from_messages([("system", "You are a helpful AI assistant named Arun."), ("user", "{input}")])
 
-llm = ChatNVIDIA(model="mixtral_8x7b")
+llm = ChatNVIDIA(model="mistralai/mixtral-8x7b-instruct-v0.1")
 chain = prompt | llm | StrOutputParser()