What is the result if you type kapsel -v in your command line/terminal?
If the result is a version < 3.9 you need to update the Kapsel command line interface by running the following two commands:
- SDK_HOME/MobileSDK3/KapselSDK/cli>npm uninstall -g kapsel
- SDK_HOME/MobileSDK3/KapselSDK/cli>npm install -g
Afterwards try running kapsel -v again. If it shows the right version now you can re-run the installer.
Kr,
Andreas