Can't start on Windows

[milen-prg]

After installing on Windows 10 Pro 64 bit:
npm install -g @jsage/jpython

The command:
npx jsage
gives:
'"bash"' is not recognized as an internal or external command,
operable program or batch file.

With:
npx jpython
Enter in JPython
Welcome to JPython. Using Node.js v18.7.0.
but there can't import jsage:
import jsage
1:12:Failed Import: 'jsage' module doesn't exist in any of the import directories: C:\Users\m_____\AppData\Roaming\npm\node_modules@jsage\jpython\src\lib