Launching Spyder after installing WinPython64-3.14.2.0slim_post1.exe does not work : the console reports that an error occured while starting the kernel and displays the following explanation :

Traceback (most recent call last):

File "C:\WPy64‑31420\python\Lib\site‑packages\spyder\plugins\ipythonconsole\widgets\main_widget.py", line 1441, in _connect_new_client_to_kernel
kernel_spec.env = future.result()
^^^^^^^^^^^^^^^
File "C:\WPy64‑31420\python\Lib\site‑packages\spyder\plugins\ipythonconsole\utils\kernelspec.py", line 260, in env
env_vars = {k: osp.expandvars(v) for k, v in env_vars.items()}
~~~~~~~~~~~~~~^^^
File "", line 411, in expandvars
TypeError: expected str, bytes or os.PathLike object, not int

I tried only the Python 3.14 version of WinPython but no other Python version of the 2025-05 post1 release.