Failed to load application: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'

Unhandled Error
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/dist-packages/twisted/application/app.py", line 674, in run
    runApp(config)
  File "/usr/local/lib/python3.8/dist-packages/twisted/scripts/twistd.py", line 29, in runApp
    runner.run()
  File "/usr/local/lib/python3.8/dist-packages/twisted/application/app.py", line 370, in run
    self.application = self.createOrGetApplication()
  File "/usr/local/lib/python3.8/dist-packages/twisted/application/app.py", line 437, in createOrGetApplication
    application = getApplication(self.config, passphrase)
--- <exception caught here> ---
  File "/usr/local/lib/python3.8/dist-packages/twisted/application/app.py", line 446, in getApplication
    application = service.loadApplication(filename, style, passphrase)
  File "/usr/local/lib/python3.8/dist-packages/twisted/application/service.py", line 404, in loadApplication
    application = sob.loadValueFromFile(filename, "application")
  File "/usr/local/lib/python3.8/dist-packages/twisted/persisted/sob.py", line 177, in loadValueFromFile
    eval(codeObj, d, d)
  File "buildbot.tac", line 4, in <module>
    from buildbot_worker.bot import Worker
  File "/usr/local/lib/python3.8/dist-packages/buildbot_worker/bot.py", line 19, in <module>
    from buildbot_worker.null import LocalWorker
  File "/usr/local/lib/python3.8/dist-packages/buildbot_worker/null.py", line 21, in <module>
    from buildbot_worker.base import WorkerBase
  File "/usr/local/lib/python3.8/dist-packages/buildbot_worker/base.py", line 27, in <module>
    from twisted.internet import reactor
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/reactor.py", line 38, in <module>
    from twisted.internet import default
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/default.py", line 55, in <module>
    install = _getInstallFunction(platform)
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/default.py", line 43, in _getInstallFunction
    from twisted.internet.epollreactor import install
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/epollreactor.py", line 19, in <module>
    from twisted.internet import posixbase
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/posixbase.py", line 16, in <module>
    from twisted.internet import error, tcp, udp
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/tcp.py", line 38, in <module>
    from twisted.internet._newtls import (
  File "/usr/local/lib/python3.8/dist-packages/twisted/internet/_newtls.py", line 18, in <module>
    from twisted.protocols.tls import TLSMemoryBIOFactory, TLSMemoryBIOProtocol
  File "/usr/local/lib/python3.8/dist-packages/twisted/protocols/tls.py", line 42, in <module>
    from OpenSSL.SSL import Connection, Error, SysCallError, WantReadError, ZeroReturnError
  File "/usr/lib/python3/dist-packages/OpenSSL/__init__.py", line 8, in <module>
    from OpenSSL import crypto, SSL
  File "/usr/lib/python3/dist-packages/OpenSSL/crypto.py", line 1553, in <module>
    class X509StoreFlags(object):
  File "/usr/lib/python3/dist-packages/OpenSSL/crypto.py", line 1573, in X509StoreFlags
    CB_ISSUER_CHECK = _lib.X509_V_FLAG_CB_ISSUER_CHECK
builtins.AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'


Failed to load application: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'