Hi!
Ok, that’s totally different, so you successfully installed it, right? I checked it and for some reason empire doesn’t work with the latest pydantic and fastapi python libraries so older versions should be installed. Make sure to delete any file or directory related to fastapi and pydantic in these locations:

/usr/lib/python3/dist-packages
/usr/local/lib/python3.11/dist-packages

Then run:
pip3 install pydantic==1.10.6
pip3 install fastapi==0.74.1

Then the server should run as expected, I tested it and it worked.

Greetings!
Diego