sshutlle failed: OSError: [Errno 88] Socket operation on non-socket

I have Ubuntu 21.04

• Description: Ubuntu 21.04
• Release: 21.04
• Codename: hirsute

I have full workable Python environment:

$ python3 -m venv my_env
$ ls my_env
bin  include  lib  lib64  pyvenv.cfg  share
$ /home/proxyadmin/environments/my_env/bin/python3
Python 3.9.5 (default, May 11 2021, 08:20:37) 
[GCC 10.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit

1. I have pip and other packages:

   sudo apt install -y python3-pip
   sudo apt install -y build-essential libssl-dev libffi-dev python3-dev
   

2. A couple of hours I try to add additional future to start Python correctly like:

   ln --symbolic /usr/bin/python3 /usr/bin/python 
   

sshutlle should be working, but no:

$ sudo sshuttle --python=/home/proxyadmin/environments/my_env/bin/python3  -r [email protected]/0 -vv 
Starting sshuttle proxy.
firewall manager: Starting firewall with Python version 2.7.18
firewall manager: ready method name nat.
IPv6 enabled: False
UDP enabled: False
DNS enabled: False
Binding redirector: 12300
TCP redirector listening on ('127.0.0.1', 12300).
TCP redirector listening with <socket._socketobject object at 0x7f3db6369280>.
Starting client with Python version 2.7.18
c : connecting to server...
c : executing: ['ssh', '[email protected]', '--', '\'/home/proxyadmin/environments/my_env/bin/python3\' -c \'import sys, os; verbosity=2; sys.stdin = os.fdopen(0, "rb"); exec(compile(sys.stdin.read(978), "assembler.py", "exec"))\'']
c :  > channel=0 cmd=PING len=7 (fullness=0)
[email protected]'s password: 
assembler.py:3: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
server: assembling 'sshuttle' (7 bytes)
server: assembling 'sshuttle.cmdline_options' (44 bytes)
server: assembling 'sshuttle.helpers' (950 bytes)
server: assembling 'sshuttle.ssnet' (5542 bytes)
server: assembling 'sshuttle.hostwatch' (2366 bytes)
server: assembling 'sshuttle.server' (3298 bytes)
Starting server with Python version 3.9.5
 s: latency control setting = True
 s: available routes:
 s:   2/192.168.4.0/24
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "assembler.py", line 37, in <module>
  File "sshuttle.server", line 250, in main
c : Connected.
c : Waiting: 2 r=[4, 8] w=[8] x=[] (fullness=7/0)
c :   Ready: 2 r=[] w=[8] x=[]
c : mux wrote: 15/15
c : Waiting: 2 r=[4, 8] w=[] x=[] (fullness=7/0)
  File "/usr/lib/python3.9/socket.py", line 545, in fromfd
    return socket(family, type, proto, nfd)
  File "/usr/lib/python3.9/socket.py", line 232, in __init__
    _socket.socket.__init__(self, family, type, proto, fileno)
OSError: [Errno 88] Socket operation on non-socket
c :   Ready: 2 r=[8] w=[] x=[]
c : fatal: server died with error code 1