Can we use Llama index without ChatGPT or OpenAI keys? I want to work on a Healtchare data, and llamaindex might help me,. Can anyone share some resources for the same?

I am not able to to do this basic piece of code in my jupyter notebook: from llama_index import VectorStoreIndex, SimpleDirectoryReader

I get errors as :
(...)
23
24 """
26 name = "edenai_text_to_speech"

File C:\ProgramData\Anaconda3\lib\typing.py:852, in _SpecialGenericAlias.subclasscheck(self, cls)
850 return issubclass(cls.origin, self.origin)
851 if not isinstance(cls, _GenericAlias):
--> 852 return issubclass(cls, self.origin)
853 return super().subclasscheck(cls)

TypeError: issubclass() arg 1 must be a class