'NoneType' object has no attribute 'prepare' when running on a virtualenv

I installed insightface on a virtual environment for python (virtualenv) but when I try to get the model I get this

>>> model = insightface.model_zoo.get_model('retinaface_r50_v1')
>>> model.prepare(ctx_id = 0, nms=0.4)
Traceback (most recent call last):
File "", line 1, in
AttributeError: 'NoneType' object has no attribute 'prepare'

If I try to do the same ouside an environment, just run the basic model, works just fine.

Anyone knows how to make it work inside a virtual environment?