Is this fix available in stable/rocky? I am facing the issue at present
keystone version 14.0.0, using juju charms to deploy and configure

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(keystone.common.wsgi): 2018-12-26 20:11:34,937 ERROR simple_bind() argument 1 must be str or None, not bytes
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/keystone/common/wsgi.py", line 148, in __call__
    result = method(req, **params)
  File "/usr/lib/python3/dist-packages/keystone/common/controller.py", line 103, in wrapper
    return f(self, request, filters, **kwargs)
  File "/usr/lib/python3/dist-packages/keystone/identity/controllers.py", line 175, in list_groups
    domain_scope=domain, hints=hints
  File "/usr/lib/python3/dist-packages/keystone/common/manager.py", line 116, in wrapped
    __ret_val = __f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/keystone/identity/core.py", line 416, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/keystone/identity/core.py", line 426, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/keystone/identity/core.py", line 1339, in list_groups
    ref_list = driver.list_groups(hints)
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/core.py", line 116, in list_groups
    return self.group.get_all_filtered(hints)
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/core.py", line 471, in get_all_filtered
    for group in self.get_all(query, hints)]
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/common.py", line 1541, in get_all
    for x in self._ldap_get_all(hints, ldap_filter)]
  File "/usr/lib/python3/dist-packages/keystone/common/driver_hints.py", line 42, in wrapper
    return f(self, hints, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/common.py", line 1489, in _ldap_get_all
    with self.get_connection() as conn:
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/common.py", line 1249, in get_connection
    conn.simple_bind_s(user, password)
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/common.py", line 892, in simple_bind_s
    clientctrls=clientctrls)
  File "/usr/lib/python3/dist-packages/keystone/identity/backends/ldap/common.py", line 747, in simple_bind_s
    with self._get_pool_connection() as conn:
  File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__
    return next(self.gen)
  File "/usr/local/lib/python3.6/dist-packages/ldappool/__init__.py", line 375, in connection
    conn = self._get_connection(bind, passwd)
  File "/usr/local/lib/python3.6/dist-packages/ldappool/__init__.py", line 325, in _get_connection
    conn = self._create_connector(bind, passwd)
  File "/usr/local/lib/python3.6/dist-packages/ldappool/__init__.py", line 266, in _create_connector
    self._bind(conn, bind, passwd)
  File "/usr/local/lib/python3.6/dist-packages/ldappool/__init__.py", line 230, in _bind
    conn.simple_bind_s(bind, passwd)
  File "/usr/local/lib/python3.6/dist-packages/ldappool/__init__.py", line 103, in simple_bind_s
    clientctrls)
  File "/usr/lib/python3/dist-packages/ldap/ldapobject.py", line 1214, in simple_bind_s
    res = self._apply_method_s(SimpleLDAPObject.simple_bind_s,*args,**kwargs)
  File "/usr/lib/python3/dist-packages/ldap/ldapobject.py", line 1196, in _apply_method_s
    return func(self,*args,**kwargs)
  File "/usr/lib/python3/dist-packages/ldap/ldapobject.py", line 443, in simple_bind_s
    msgid = self.simple_bind(who,cred,serverctrls,clientctrls)
  File "/usr/lib/python3/dist-packages/ldap/ldapobject.py", line 437, in simple_bind
    return self._ldap_call(self._l.simple_bind,who,cred,RequestControlTuples(serverctrls),RequestControlTuples(clientctrls))
  File "/usr/lib/python3/dist-packages/ldap/ldapobject.py", line 313, in _ldap_call
    result = func(*args,**kwargs)
TypeError: simple_bind() argument 1 must be str or None, not bytes