To use Natural for Visual Studio Code, Java 21 or later must be installed. Both the Natural language server used by the source editor and the Natural debug adapter run as Java processes in the background and require this Java version.
If
JAVA_HOME does not point to Java 21 or later, the language server cannot start. As a result, the Natural sources are shown without syntax highlighting, and building, executing and debugging a Natural application fails. See
Troubleshooting for more information.