runtime error

Exit code: 1. Reason: /usr/local/lib/python3.10/site-packages/pydantic/_internal/_config.py:341: UserWarning: Valid config keys have changed in V2: * 'allow_population_by_field_name' has been renamed to 'populate_by_name' * 'smart_union' has been removed warnings.warn(message, UserWarning) Traceback (most recent call last): File "/home/user/app/app.py", line 6, in <module> os.environ["OPENAI_API_KEY"] =os.getenv("API_Key") File "/usr/local/lib/python3.10/os.py", line 685, in __setitem__ value = self.encodevalue(value) File "/usr/local/lib/python3.10/os.py", line 757, in encode raise TypeError("str expected, not %s" % type(value).__name__) TypeError: str expected, not NoneType

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