incorrect passphrase error

Hi, I'm having problems reading messages due to an error thrown by pgpy. This is my current code:

from protonmail import ProtonMail
import random
import uuid

proton_username = "MyProtonEmail@proton.me"
proton_password = "MyProtonPassword"
passphrase = "<12 words phrase separated by spaces>"

proton = ProtonMail()
try:
    proton.load_session("session.pickle", auto_save=True)
except:
    print("no session found, logging in")
    proton.login(proton_username, proton_password)
    private_key = "privatekey.MyProtonEmail@proton.me-ce0...1f.asc"
    proton.pgp_import(private_key, passphrase=passphrase)
    proton.save_session("session.pickle")

messages = proton.get_messages()
assert len(messages) > 0, "No messages found."
print(messages[0].sender.address)
message = proton.read_message(messages[0])
print(message.sender.address)
print(message.body)

But I keep getting this error:

  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/protonmail/client.py", line 118, in read_message
    message.body = self.pgp.decrypt(message.body)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/protonmail/pgp.py", line 53, in decrypt
    with pgp_private_key.unlock(passphrase) as key:
  File "/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/contextlib.py", line 137, in __enter__
    return next(self.gen)
           ^^^^^^^^^^^^^^
  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/pgpy/pgp.py", line 1811, in unlock
    sk._key.unprotect(passphrase)
  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/pgpy/packet/packets.py", line 941, in unprotect
    self.keymaterial.decrypt_keyblob(passphrase)
  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/pgpy/packet/fields.py", line 1559, in decrypt_keyblob
    kb = super(EdDSAPriv, self).decrypt_keyblob(passphrase)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/edoardo/Library/Python/3.11/lib/python/site-packages/pgpy/packet/fields.py", line 1264, in decrypt_keyblob
    raise PGPDecryptionError("Passphrase was incorrect!")
pgpy.errors.PGPDecryptionError: Passphrase was incorrect!

Maybe I'm doing something wrong, I got the phrase from here

Is it correct? What am I doing wrong?

opulentfox-29 / protonmail-api-client

incorrect passphrase error #12