The MSX keyboard came in internal and external units. One troubleshooting hint when an MSX machine does not display an image is to press the CAPS key repeatedly to see if the LED toggles.
To download this Add-On, we highly recommend you do it via the user interface in Kodi. Simply look for the "Get More" button in the Add-Ons menu. If you want to install it manually, you can direct download the zip below then in Kodi, look for the "Install via Zip" option.