AttributeError: cffi library '_openssl' has no function, constant or global variable named 'Cryptography_HAS_EVP_PKEY_get_set_tls_encodedpoint'

[Germey]

$ gerapy init
$ cd gerapy/
$ ls
projects
$ gerapy migrate
Traceback (most recent call last):
File "/home/datacrawl/.local/bin/gerapy", line 11, in
sys.exit(cmd())
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/cmd/init.py", line 27, in cmd
server()
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/cmd/server.py", line 6, in server
manage()
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/server/manage.py", line 23, in manage
execute_from_command_line(sys.argv)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/init.py", line 371, in execute_from_command_line
utility.execute()
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/init.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/base.py", line 332, in execute
self.check()
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/base.py", line 364, in check
include_deployment_checks=include_deployment_checks,
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/commands/migrate.py", line 58, in _run_checks
issues.extend(super()._run_checks(**kwargs))
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/management/base.py", line 351, in _run_checks
return checks.run_checks(**kwargs)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/checks/registry.py", line 73, in run_checks
new_errors = check(app_configs=app_configs)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 13, in check_url_config
return check_resolver(resolver)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 23, in check_resolver
return check_method()
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 397, in check
for pattern in self.url_patterns:
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/utils/functional.py", line 36, in get
res = instance.dict[self.name] = self.func(instance)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 536, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/utils/functional.py", line 36, in get
res = instance.dict[self.name] = self.func(instance)
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 529, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib/python3.5/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 986, in _gcd_import
File "", line 969, in _find_and_load
File "", line 958, in _find_and_load_unlocked
File "", line 673, in _load_unlocked
File "", line 665, in exec_module
File "", line 222, in _call_with_frames_removed
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/server/server/urls.py", line 21, in
url(r'^', include('gerapy.server.core.urls')),
File "/home/datacrawl/.local/lib/python3.5/site-packages/django/urls/conf.py", line 34, in include
urlconf_module = import_module(urlconf_module)
File "/usr/lib/python3.5/importlib/init.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 986, in _gcd_import
File "", line 969, in _find_and_load
File "", line 958, in _find_and_load_unlocked
File "", line 673, in _load_unlocked
File "", line 665, in exec_module
File "", line 222, in _call_with_frames_removed
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/server/core/urls.py", line 2, in
from . import views
File "/home/datacrawl/.local/lib/python3.5/site-packages/gerapy/server/core/views.py", line 1, in
import json, os, requests, time, pytz, pymongo, string
File "/home/datacrawl/.local/lib/python3.5/site-packages/requests/init.py", line 84, in
from urllib3.contrib import pyopenssl
File "/home/datacrawl/.local/lib/python3.5/site-packages/urllib3/contrib/pyopenssl.py", line 46, in
import OpenSSL.SSL
File "/home/datacrawl/.local/lib/python3.5/site-packages/OpenSSL/init.py", line 8, in
from OpenSSL import crypto, SSL
File "/home/datacrawl/.local/lib/python3.5/site-packages/OpenSSL/crypto.py", line 16, in
from OpenSSL._util import (
File "/home/datacrawl/.local/lib/python3.5/site-packages/OpenSSL/_util.py", line 6, in
from cryptography.hazmat.bindings.openssl.binding import Binding
File "/home/datacrawl/.local/lib/python3.5/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 156, in
Binding.init_static_locks()
File "/home/datacrawl/.local/lib/python3.5/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 137, in init_static_locks
cls._ensure_ffi_initialized()
File "/home/datacrawl/.local/lib/python3.5/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 124, in _ensure_ffi_initialized
cls.lib = build_conditional_library(lib, CONDITIONAL_NAMES)
File "/home/datacrawl/.local/lib/python3.5/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 84, in build_conditional_library
if not getattr(lib, condition):
AttributeError: cffi library '_openssl' has no function, constant or global variable named 'Cryptography_HAS_EVP_PKEY_get_set_tls_encodedpoint'

[Germey]

$ pip3 list
adslproxy (1.0.0)
aiohttp (2.2.5)
appdirs (1.4.3)
asn1crypto (0.24.0)
async-timeout (1.3.0)
attrs (17.1.0)
Automat (0.6.0)
azure-common (1.1.6)
azure-nspkg (2.0.0)
azure-storage (0.34.2)
blinker (1.3)
certifi (2018.1.18)
cffi (1.11.4)
chardet (3.0.4)
click (6.7)
cloud-init (0.7.9)
command-not-found (0.3)
configobj (5.0.6)
constantly (15.1.0)
cryptography (1.8.1)
cssselect (1.0.3)
Django (1.11.3)
django-cors-headers (2.1.0)
docopt (0.6.2)
Flask (0.12.2)
Flask-Login (0.4.0)
gerapy (0.6.6)
hyperlink (17.3.1)
idna (2.5)
incremental (17.5.0)
itsdangerous (0.24)
Jinja2 (2.10)
jsonpatch (1.10)
jsonpointer (1.9)
language-selector (0.1)
lxml (3.7.3)
MarkupSafe (1.0)
multidict (3.1.3)
oauthlib (1.0.3)
olefile (0.44)
packaging (16.8)
parsel (1.3.1)
Pillow (4.1.1)
pip (8.1.1)
prettytable (0.7.2)
py2neo (3.1.2)
pyasn1 (0.2.3)
pyasn1-modules (0.0.8)
pycparser (2.18)
pycrypto (2.6.1)
pycurl (7.43.0)
PyDispatcher (2.0.5)
pygobject (3.20.0)
PyJWT (1.3.0)
pymongo (3.6.0)
PyMySQL (0.8.0)
pyOpenSSL (17.0.0)
pyparsing (2.2.0)
pyquery (1.2.17)
pyserial (3.0.1)
pyspider (0.3.8)
python-apt (1.1.0b1)
python-dateutil (2.6.0)
python-debian (0.1.27)
python-scrapyd-api (2.0.1)
python-systemd (231)
pytz (2017.2)
PyYAML (3.11)
qiniu (7.1.6)
queuelib (1.4.2)
redis (2.10.5)
requests (2.14.2)
Scrapy (1.4.0)
scrapy-redis (0.6.8)
scrapy-splash (0.7.2)
scrapyd (1.2.0)
selenium (3.5.0)
service-identity (16.0.0)
setuptools (35.0.2)
six (1.10.0)
ssh-import-id (5.5)
tornado (4.5.1)
Twisted (17.1.0)
u-msgpack-python (2.4.1)
ufw (0.35)
unattended-upgrades (0.1)
urllib3 (1.21.1)
w3lib (1.17.0)
WALinuxAgent (2.2.9)
Werkzeug (0.12.2)
wheel (0.29.0)
yarl (0.12.0)
zope.interface (4.4.1)

[Germey]

$ cat /proc/version
Linux version 4.4.0-78-generic (buildd@lgw01-11) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #99-Ubuntu SMP Thu Apr 27 15:29:09 UTC 2017

[Germey]

Remove cryptography and reinstall version>=2.1.1:

pip3 uninstall cryptography
pip3 install cryptography>=2.1.1

[Allan-Nava]

I got this error:

File "/home/ies/.local/lib/python3.5/site-packages/cryptography/hazmat/bindings/openssl/binding.py", line 85, in build_conditional_library
    if not getattr(lib, condition):
AttributeError: cffi library '_openssl' has no function, constant or global variable named 'Cryptography_HAS_PSK'