runtime error

iv/tool.py", line 12, in <module> from langchain.utilities.arxiv import ArxivAPIWrapper File "/home/user/.local/lib/python3.8/site-packages/langchain/utilities/__init__.py", line 3, in <module> from langchain.utilities.apify import ApifyWrapper File "/home/user/.local/lib/python3.8/site-packages/langchain/utilities/apify.py", line 5, in <module> from langchain.document_loaders import ApifyDatasetLoader File "/home/user/.local/lib/python3.8/site-packages/langchain/document_loaders/__init__.py", line 44, in <module> from langchain.document_loaders.embaas import EmbaasBlobLoader, EmbaasLoader File "/home/user/.local/lib/python3.8/site-packages/langchain/document_loaders/embaas.py", line 54, in <module> class BaseEmbaasLoader(BaseModel): File "pydantic/main.py", line 204, in pydantic.main.ModelMetaclass.__new__ File "pydantic/fields.py", line 488, in pydantic.fields.ModelField.infer File "pydantic/fields.py", line 419, in pydantic.fields.ModelField.__init__ File "pydantic/fields.py", line 539, in pydantic.fields.ModelField.prepare File "pydantic/fields.py", line 801, in pydantic.fields.ModelField.populate_validators File "pydantic/validators.py", line 696, in find_validators File "pydantic/validators.py", line 585, in pydantic.validators.make_typeddict_validator File "pydantic/annotated_types.py", line 35, in pydantic.annotated_types.create_model_from_typeddict File "pydantic/main.py", line 972, in pydantic.main.create_model File "pydantic/main.py", line 204, in pydantic.main.ModelMetaclass.__new__ File "pydantic/fields.py", line 488, in pydantic.fields.ModelField.infer File "pydantic/fields.py", line 419, in pydantic.fields.ModelField.__init__ File "pydantic/fields.py", line 534, in pydantic.fields.ModelField.prepare File "pydantic/fields.py", line 638, in pydantic.fields.ModelField._type_analysis File "/usr/local/lib/python3.8/typing.py", line 774, in __subclasscheck__ return issubclass(cls, self.__origin__) TypeError: issubclass() arg 1 must be a class

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