devpi-server login issue using argon2

2019-08-15 11:45:12,461 ERROR Exception while serving /+login
Traceback (most recent call last):
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/tweens.py", line 13, in _error_handler
    response = request.invoke_exception_view(exc_info)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/view.py", line 779, in invoke_exception_view
    raise HTTPNotFound
pyramid.httpexceptions.HTTPNotFound: The resource could not be found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/devpi/piserv/lib/python3.7/site-packages/waitress/channel.py", line 356, in service
    task.service()
  File "/home/devpi/piserv/lib/python3.7/site-packages/waitress/task.py", line 176, in service
    self.execute()
  File "/home/devpi/piserv/lib/python3.7/site-packages/waitress/task.py", line 447, in execute
    app_iter = self.channel.server.application(env, start_response)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/views.py", line 151, in __call__
    return self.app(environ, start_response)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/router.py", line 270, in __call__
    response = self.execution_policy(environ, self)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/router.py", line 279, in default_execution_policy
    return request.invoke_exception_view(reraise=True)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/view.py", line 778, in invoke_exception_view
    reraise_(*exc_info)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/compat.py", line 179, in reraise
    raise value
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/router.py", line 277, in default_execution_policy
    return router.invoke_request(request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/router.py", line 249, in invoke_request
    response = handle_request(request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/views.py", line 175, in request_log_handler
    response = handler(request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/views.py", line 211, in request_tx_handler
    response = handler(request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/tweens.py", line 43, in excview_tween
    response = _error_handler(request, exc)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/tweens.py", line 17, in _error_handler
    reraise(*exc_info)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/compat.py", line 179, in reraise
    raise value
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/tweens.py", line 41, in excview_tween
    response = handler(request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/router.py", line 148, in handle_request
    registry, request, context, context_iface, view_name
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/view.py", line 667, in _call_view
    response = view_callable(context, request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/config/views.py", line 188, in attr_view
    return view(context, request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/config/views.py", line 214, in predicate_wrapper
    return view(context, request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/viewderivers.py", line 401, in viewresult_to_response
    result = view(context, request)
  File "/home/devpi/piserv/lib/python3.7/site-packages/pyramid/viewderivers.py", line 116, in _class_requestonly_view
    response = getattr(inst, attr)()
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/views.py", line 1175, in login
    proxyauth = self.auth.new_proxy_auth(user, password)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/auth.py", line 87, in new_proxy_auth
    result = self._validate(username, password)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/auth.py", line 68, in _validate
    if user.validate(authpassword):
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/model.py", line 300, in validate
    valid, newhash = verify_and_update_password_hash(password, pwhash, salt)
  File "/home/devpi/piserv/lib/python3.7/site-packages/devpi_server/auth.py", line 150, in verify_and_update_password_hash
    (valid, newhash) = pwd_context.verify_and_update(password, hash)
  File "/home/devpi/piserv/lib/python3.7/site-packages/passlib/context.py", line 2428, in verify_and_update
    if not record.verify(secret, hash, **clean_kwds):
  File "/home/devpi/piserv/lib/python3.7/site-packages/passlib/handlers/argon2.py", line 611, in verify
    raise cls._adapt_backend_error(err, hash=hash)
  File "/home/devpi/piserv/lib/python3.7/site-packages/passlib/handlers/argon2.py", line 501, in _adapt_backend_error
    raise exc.MalformedHashError(cls, reason=reason)
ValueError: malformed argon2 hash (argon2_cffi reported: Memory allocation error: hash=b'$argon2i$v=19$m=102400,t=2,p=8$NSYEwHiP0VoLQQgBAKD0Pg$Tg493ikpeaglkoFmG5AdYw')