can't login with two users

2017-12-08T18:56:27+0100 [leap.bitmask.core.dispatcher#error] [DISPATCHER] Unexpected error!
2017-12-08T18:56:27+0100 [leap.bitmask.core.dispatcher#error] AlreadyCalledError()
2017-12-08T18:56:27+0100 [leap.bitmask.core.dispatcher#error] Traceback (most recent call last):
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 653, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 1117, in _cbDeferred
            self.callback(self.resultList)
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 459, in callback
            self._startRunCallbacks(result)
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 567, in _startRunCallbacks
            self._runCallbacks()
        --- <exception caught here> ---
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 653, in _runCallbacks
            current.result = callback(current.result, *args, **kw)
          File "/home/user/dev/bitmask-dev/src/leap/bitmask/bonafide/config.py", line 423, in <lambda>
            self.stuck_bootstrap.callback('continue!'))
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 459, in callback
            self._startRunCallbacks(result)
          File "/home/user/envs/bitmask/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 560, in _startRunCallbacks
            raise AlreadyCalledError
        twisted.internet.defer.AlreadyCalledError: