AttributeError: type object 'Problem' has no attribute '__pydantic_model__'

[Dvz99]

Hello,

I'm a noob when it comes to programming. If I understand correctly this solver can be used in Python? I have installed vrp_cli and pydantic with pip, downloaded pragmatic_types.py and config_types.py and I get the error as mentioned in the title:

AttributeError: type object 'Problem' has no attribute 'pydantic_model'

I don't understand how I can fix this. If someone can help me, I'd be very grateful!