Hi!
This probably happens because pydantic.fields.Schema was deprecated in version 1.8 of Pydantic. In your virtual environment, you could install pydantic==1.7 first, then install Prodigy, and hopefully it should work.
This has been fixed in Prodigy v1.10.7 - the related thread is here for background information: ImportError: cannot import name 'Schema' from 'pydantic'
Let us know if you'd still run into issues though!