runtime error

Traceback (most recent call last): File "app.py", line 2, in <module> from llama_index import GPTSimpleVectorIndex, download_loader ImportError: cannot import name 'GPTSimpleVectorIndex' from 'llama_index' (/home/user/.local/lib/python3.8/site-packages/llama_index/__init__.py)

Container logs: