runtime error

Exit code: 1. Reason: Traceback (most recent call last): File "/home/user/app/app.py", line 5, in <module> from src.flexible_agent import FlexibleAgent File "/home/user/app/src/flexible_agent.py", line 6, in <module> from langchain_core.messages import HumanMessage, AIMessage, BaseMessage ModuleNotFoundError: No module named 'langchain_core'

Container logs: