runtime error

Exit code: 1. Reason: /usr/local/lib/python3.10/site-packages/pypdf/_crypt_providers/_cryptography.py:32: CryptographyDeprecationWarning: ARC4 has been moved to cryptography.hazmat.decrepit.ciphers.algorithms.ARC4 and will be removed from cryptography.hazmat.primitives.ciphers.algorithms in 48.0.0. from cryptography.hazmat.primitives.ciphers.algorithms import AES, ARC4 Traceback (most recent call last): File "/home/user/app/app.py", line 2, in <module> from pipeline import preprocessing_pipeline, conversational_rag File "/home/user/app/pipeline.py", line 34, in <module> os.environ["COHERE_API_KEY"] = os.getenv('COHERE_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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