Probleme activation extension TERMEF dans WRITER

Bonjour,
Impossible d’activer TERMEF, la tentative d’activation produit le message d’erreur suivant, avec la version 28.4
[jni_uno bridge error] UNO calling Java method writeRegistryInfo: non-UNO exception occurred: java.lang.UnsupportedClassVersionError: com/mondeca/termef/sidebar/Component has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
java stack trace:
java.lang.UnsupportedClassVersionError: com/mondeca/termef/sidebar/Component has been compiled by a more recent version of the Java Runtime (class file version 55.0), 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(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.sun.star.comp.loader.RegistrationClassFinder.find(RegistrationClassFinder.java:53)
at com.sun.star.comp.loader.JavaLoader.writeRegistryInfo(JavaLoader.java:376)

24.8 ?
et ça ne doit pas être directement lié à cette version,
mais plutôt à la (nouvelle) version de TerMef » Libreoffice Extensions

il faut installer une version >= 11