Traceback (most recent call last):
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/util.py", line 1068, in run_with_except_hook
    run_original(*args2, **kwargs2)
  File "/usr/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/gui/qt/main_window.py", line 2272, in privkeys_thread
    privkey = self.wallet.export_private_key(addr, password)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/wallet.py", line 818, in export_private_key
    pk, compressed = self.keystore.get_private_key(index, password)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/keystore.py", line 692, in get_private_key
    xprv = self.get_master_private_key(password)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/keystore.py", line 644, in get_master_private_key
    return pw_decode(self.xprv, password, version=self.pw_hash_version)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/crypto.py", line 315, in pw_decode
    plaintext_bytes = pw_decode_bytes(data, password, version=version)
  File "/home/mridea/.local/lib/python3.10/site-packages/electrum/crypto.py", line 269, in pw_decode_bytes
    data_bytes = bytes(base64.b64decode(data, validate=True))
  File "/usr/lib/python3.10/base64.py", line 80, in b64decode
    s = _bytes_from_decode_data(s)
  File "/usr/lib/python3.10/base64.py", line 45, in _bytes_from_decode_data
    raise TypeError("argument should be a bytes-like object or ASCII "
TypeError: argument should be a bytes-like object or ASCII string, not 'NoneType'