Server sign and encrypt fails after connection setup and login

[leonardo1717]

I am working to get a server up and running with sign and encrypt configuration. I used the server example from github as template for my server. As client I use UaExpert. For the server I took the certificate and key from the example and from UaExpert I exported its certificate to use in the server configuration. In this setup the server fails After the connection is setup and the user verified with some error. I cannot figure out what is causing this error. I hope someone can help. The error is

Checking permissions for user User(role=<UserRole.User: 3>, name='UaExpert')
...............messge body is Buffer(size:34, data:b'\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\xd3\x08\r\x00\x00\x00\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff')
.......................typeid i=631
Error while processing message
Traceback (most recent call last):
File "C:\Python\lib\site-packages\asyncua\server\uaprocessor.py", line 126, in process_message
return await self._process_message(typeid, requesthdr, seqhdr, body)
File "C:\Python\lib\site-packages\asyncua\server\uaprocessor.py", line 166, in _process_message
if self._connection.security_policy.permissions.check_validity(user, typeid, body) is False:
TypeError: check_validity() missing 1 required positional argument: 'body'

The first 3 lines are loglines I added to uaprocessor.py to get some more info.

Below my code

import sys
sys.path.insert(0, "..")
import asyncio

from asyncua import ua, uamethod, Server
from asyncua.crypto.permission_rules import SimpleRoleRuleset
from asyncua.server.users import UserRole
from asyncua.server.user_managers import CertificateUserManager

import json
import asyncpg

# Global variable
server = None           # OPCUA server object
cfg = None              # configuration JSON data object

async def main():
    global server
    global cfg

    # read config file
    cfg = getConfigurationData('./config.json')
    cfg["devices"] = {}
    for device in cfg["devicelist"]:
        cfg["devices"][device["nodeid"]] = device["opcname"]

    # setup our server
    cert_user_manager = CertificateUserManager()
    await cert_user_manager.add_user('user_certificates/uaExpert.cer', name='UaExpert')
    server = Server(user_manager=cert_user_manager)

    server.set_endpoint("opc.tcp://0.0.0.0:4840/")
    await server.init()

    server.set_security_policy([ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt], permission_ruleset=SimpleRoleRuleset)

    await server.load_certificate("certificate.pem")
    await server.load_private_key("key.pem")

[leonardo1717]

The error is all mine.

This line

server.set_security_policy([ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt], permission_ruleset=SimpleRoleRuleset)

needs to be changed into

server.set_security_policy([ua.SecurityPolicyType.Basic256Sha256_SignAndEncrypt], permission_ruleset=SimpleRoleRuleset())

and then ..... it works!