No module named 'emmet.core._messages'

Hello, this failure occurred suddenly today, and I used ‘from mp_api.client import MPRester’ as well.

Who has had similar experience, can you help me? thank you.

Are you running the latest versions of mp-api and emmet-core?

I installed the mendeleev library using pip install mendeleev, and perhaps installing it messed up some of the dependency versions in my virtual environment.