It looks like the problem is plac which is a dependency of Prodigy. Just curious - can you try to only install plac on its own: pip install plac?
Since you can't pip install prodigy - I'm wondering if plac may be blocked too.
It is possible to install Prodigy on airtight environment. Here's a post:
You would need to install each of the dependencies separately. Perhaps try this first because if you find for whatever reason you can't install those dependencies like plac, it's a bit of a non-starter to think about Prodigy.
The post itself is a little out-of-date, so here's v1.11.14's current dependencies:
spacy>=3.1.1,<3.6.0
wasabi
srsly>=2.0.0,<3.0.0
catalogue
toolz>=0.8.2,<1.0.0
plac>=0.9.6,<1.2.0
requests
pydantic>=1.10.4,<2.0
fastapi>=0.65.1,<0.95.1
aiofiles
uvicorn>=0.13.3,<0.19.0
peewee>=3.12.0,< 3.17.0
cachetools>=4.2
pyjwt<3.0.0,>=2.0.0
uvloop<=0.14.0; python_version < "3.7" and platform_system != "Windows"
jinja2
python-dotenv>=0.21.1,<2.0.0
typeguard>=3.0.2,<4.0
tqdm>=4.38.0,<5.0.0
typing_extensions<4.6.0
Does this help?