OS Shell commands doesn't work (on W11)

GNAT Studio 23.0w on Windows 11

The window "OS Shell" isn't responding : nothing happens when I type a Windows command and the Messages window shows this error : 
Traceback (most recent call last):
  File "C:\GNATSTUDIO\share\gnatstudio\support\core\gs_utils\console_process.py", line 152, in on_input
    self.send(input)
GPS.Exception: The process is dead or was not started