Traceback (most recent call last):


 "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main

"__main__", fname, loader, pkg_name)


 "/usr/lib/python2.7/runpy.py", line 72, in _run_code

exec code in run_globals


 "/usr/lib/python2.7/dist-packages/synapse/app/homeserver.py", line 62, in <module>

from synapse.util.manhole import manhole


 "/usr/lib/python2.7/dist-packages/synapse/util/manhole.py", line 17, in <module>

from twisted.conch import manhole_ssh


 "/usr/local/lib/python2.7/dist-packages/twisted/conch/manhole_ssh.py", line 14, in <module>

from twisted.conch.ssh import factory, session


 "/usr/local/lib/python2.7/dist-packages/twisted/conch/ssh/factory.py", line 18, in <module>

from twisted.conch.ssh import (_kex, transport, userauth, connection)


 "/usr/local/lib/python2.7/dist-packages/twisted/conch/ssh/transport.py", line 345, in <module>

class SSHTransportBase(protocol.Protocol):


 "/usr/local/lib/python2.7/dist-packages/twisted/conch/ssh/transport.py", line 479, in SSHTransportBase

supportedKeyExchanges = _kex.getSupportedKeyExchanges()


 "/usr/local/lib/python2.7/dist-packages/twisted/conch/ssh/_kex.py", line 289, in getSupportedKeyExchanges

supported = backend.elliptic_curve_exchange_algorithm_supported(
AttributeError: 'MultiBackend' object has no attribute 'elliptic_curve_exchange_algorithm_supported'

Traceback (most recent call last):


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/core/policies/ensemble.py", line 320, in from_dict

constr_func = registry.policy_from_module_path(policy_name)


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/core/registry.py", line 21, in policy_from_module_path

module_path, lookup_path="rasa.core.policies.registry"


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/utils/common.py", line 208, in class_from_module_path

m = importlib.import_module(lookup_path)


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/importlib/__init__.py", line 127, in import_module

return _bootstrap._gcd_import(name[level:], package, level)


 "<frozen importlib._bootstrap>", line 1006, in _gcd_import


 "<frozen importlib._bootstrap>", line 983, in _find_and_load


 "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked


 "<frozen importlib._bootstrap>", line 677, in _load_unlocked


 "<frozen importlib._bootstrap_external>", line 728, in exec_module


 "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/core/policies/registry.py", line 5, in <module>

from rasa.core.policies.embedding_policy import EmbeddingPolicy


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/core/policies/embedding_policy.py", line 22, in <module>

from rasa.utils import train_utils


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/rasa/utils/train_utils.py", line 10, in <module>

from tensor2tensor.models.transformer import (


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/tensor2tensor/models/__init__.py", line 25, in <module>

from tensor2tensor.layers import modalities
# pylint: disable=g-import-not-at-top


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/tensor2tensor/layers/modalities.py", line 28, in <module>

from tensor2tensor.layers import common_attention


 "/Users/ella/miniconda3/envs/pre-poetry/lib/python3.7/site-packages/tensor2tensor/layers/common_attention.py", line 952, in <module>

def attention_bias_to_padding(attention_bias, cast_fn=tf.to_float):
AttributeError: module 'tensorflow' has no attribute 'to_float'
