Saxon

We are running tests to switch from Saxon-EE 11.5 to 12.2. When starting a transformation via the command line, we now get the following error message:

Exception in thread "main" java.lang.NoClassDefFoundError: org/jdom2/Document
	at net.sf.saxon.option.jdom2.JDOM2ObjectModel.isRecognizedNodeClass(JDOM2ObjectModel.java:159)
	at net.sf.saxon.option.jdom2.JDOM2ObjectModel.getJPConverter(JDOM2ObjectModel.java:118)
	at net.sf.saxon.expr.JPConverter.allocate(JPConverter.java:207)
	at com.saxonica.expr.JavaExtensionFunctionCall.typeCheck(JavaExtensionFunctionCall.java:256)
	at net.sf.saxon.style.StyleElement.typeCheck(StyleElement.java:1556)
	at net.sf.saxon.style.XSLSequence.validate(XSLSequence.java:94)
	at net.sf.saxon.style.StyleElement.validateSubtree(StyleElement.java:1736)
	at net.sf.saxon.style.StyleElement.validateChildren(StyleElement.java:1769)
	at net.sf.saxon.style.StyleElement.validateSubtree(StyleElement.java:1740)
	at net.sf.saxon.style.PrincipalStylesheetModule.preprocess(PrincipalStylesheetModule.java:398)
	at net.sf.saxon.style.Compilation.compilePackage(Compilation.java:290)
	at net.sf.saxon.style.StylesheetModule.loadStylesheet(StylesheetModule.java:254)
	at net.sf.saxon.style.Compilation.compileSingletonPackage(Compilation.java:113)
	at net.sf.saxon.s9api.XsltCompiler.compile(XsltCompiler.java:971)
	at net.sf.saxon.Transform.doTransform(Transform.java:777)
	at net.sf.saxon.Transform.main(Transform.java:83)
Caused by: java.lang.ClassNotFoundException: org.jdom2.Document
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 16 more

whereas with version 11.5 this went smoothly. Does something need to be adjusted or have we overlooked something?