ValueError: Ciphertext too large

Trying to extract key and finding a ValueError. Please only bid if you know how to solve the below:

Please enter mobile recovery passphrase:
Please enter recovery RSA private key passphrase:
Traceback (most recent call last):
File "fb_recover_keys.py", line 128, in <module>
main()
File "fb_recover_keys.py", line 93, in main
privkeys = recover.restore_key_and_chaincode(
File "/home/njn/Desktop/fireblocks-key-recovery-tool-master/utils/recover.py", line 253, in restore_key_and_chaincode
data = cipher.decrypt(file.read())
File "/home/njn/.local/lib/python3.8/site-packages/Crypto/Cipher/PKCS1_OAEP.py", line 171, in decrypt
m_int = self._key._decrypt(ct_int)
File "/home/njn/.local/lib/python3.8/site-packages/Crypto/PublicKey/RSA.py", line 154, in _decrypt
raise ValueError("Ciphertext too large")
ValueError: Ciphertext too large