Windows post-install error

[larsoner]

See for example https://github.com/mne-tools/mne-installers/actions/runs/12401899838/job/34630740712?pr=318

Run .\%MNE_INSTALLER_NAME% /S /InstallationType=JustMe /AddToPath=1
Welcome to MNE-Python 1.9.0_0

By continuing this installation you are accepting this license agreement:
C:\Users\runneradmin\mne-python\1.9.0_0\license.rtf
Please run the installer in GUI mode to read the details.

MNE-Python will now be installed into this location:
C:\Users\runneradmin\mne-python\1.[9](https://github.com/mne-tools/mne-installers/actions/runs/12401899838/job/34630740712?pr=318#step:5:9).0_0

Unpacking payload...
Setting up the package cache...
Setting up the base environment...
Installing packages for base, creating shortcuts if necessary...
Initializing conda directories...
Running post install...

then

Error:  Failed to run post install script

but it finishes installing

Clearing package cache...
Adding to PATH...
Setting installation directory permissions...
Done!

Should figure out what this uncaught error is.