JNI error - version mismatch

Hello Elasticsearch maintainers,

I've been scouring bugzilla and the FreeBSD forums for an answer, but 
couldn't find any.

Every time I run the elasticsearch-certutil after installing the 
elasticsearch8 package, I get the following error:

$ elasticsearch-certutil ca --ca-dn "CN=BSD" --pem --out /tmp/elastic-ca.zip
Error: A JNI error has occurred, please check your installation and try 
again
Exception in thread "main" java.lang.UnsupportedClassVersionError: 
org/elasticsearch/launcher/CliToolLauncher has been compiled by a more 
recent version of the Java Runtime (class file version 61.0), this 
version of the Java Runtime only recognizes class file versions up to 52.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
     at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
     at 
sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)

It seems to me that Java 11 or 8 that comes with the pkg needs to be 
compiled with a higher version.
Have you seen this error before?

Regards and thanks for keeping Elasticsearch and friends updated in FreeBSD.

Benedict