How to set java home in firebird 3

Question

I need to specify JAVA_HOME in the file plugins.conf.

My Java path is c:\Program Files\Java\jdk1.8.0_211.

I try add this path, but get error:

External engine JAVA not found

Plugin = JAVA {
    Module = $(dir_plugins)/fbjava
    Config = JAVA_config
}

Config = JAVA_config {
    JavaHome = c:\Program Files\Java\jdk1.8.0_211
    SecurityDatabase = $(this)/java-security.fdb
    JvmArgsFile = $(this)/jvm.args
    JarDirs = $(this)/jar
}