This page is meant to explain how to solve common issues when installing or using KAMI. If you experience an issue and it's not listed here, please open a new issue and a contributor will help you further.
If you encounter this error when building, you most likely don't have the Java Development Kit (JDK) installed. Head over to here to download the oracle JDK. Install it and try again.
What .jar are you using in your mods folder? Make sure to use the one that ends with -full (KAMI-MCVER-KAMIVER-full.jar)
Please make sure you're on the latest version of forge before proceeding!