Can't add a pubkey as it's wrong format

DEBUG:node:connect_current_block:Received a block : 5dzkz
DEBUG:node:refresh_block:Requesting connection info: duniter-g1.vincentux.fr:443
DEBUG:identities:execute_requests:2001
ERROR:root:Task exception was never retrieved
future: <Task finished coro=<check_pubkey() done, defined at /home/moul/projects/sakia_git/src/sakia/gui/dialogs/connection_cfg/controller.py:293> exception=InvalidStateError('FINISHED: <Future finished result=None>',)>
Traceback (most recent call last):
  File "/home/moul/.pyenv/versions/3.5.2/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/home/moul/projects/sakia_git/src/sakia/gui/dialogs/connection_cfg/controller.py", line 315, in check_pubkey
    self.step_key.set_result(None)
  File "/home/moul/.pyenv/versions/3.5.2/lib/python3.5/asyncio/futures.py", line 329, in set_result
    raise InvalidStateError('{}: {!r}'.format(self._state, self))
asyncio.futures.InvalidStateError: FINISHED: <Future finished result=None>
DEBUG:node:refresh_block:Changed block 15503 -> 15503
DEBUG:network:handle_change:000004B819 -> 000004B819
DEBUG:controller:process:Error code 1002 - Pubkey format is incorrect, must be a Base58 string
DEBUG:controller:process:Begin process
DEBUG:controller:process:Licence step
DEBUG:controller:process:Key step
DEBUG:controller:process:Pubkey mode