ModuleNotFoundError when looking up in conn.modules

[sergei-sh]

Desired: no error on the server side
Actual: see
screenshot

Environment

• rpyc version
  5.0.1
• python version
  3.8
• operating system
  Server: win-10-x64
  Client: debian (5.10)

Minimal example

Server:

        server = ThreadedServer(SlaveService,
                                hostname=args.host,
                                port=args.port,
                                protocol_config={'sync_request_timeout': 600})
        server.start()

Client:

    if 'test_name' in conn.modules:
        pass

    if abs_name in conn.modules:
        pass