Vocabularies not deployed when JSF UI not installed

java.lang.RuntimeException: Cannot load class: org.nuxeo.ecm.directory.api.ui.HierarchicalDirectoryUIDeleteConstraint wh
ile processing component: studio.extensions.dam-solution-nuxeo
        at org.nuxeo.runtime.model.impl.ExtensionPointImpl.loadContributions(ExtensionPointImpl.java:110)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.lambda$loadContributions$3(ComponentManagerImpl.java:464)
        at java.util.Optional.ifPresent(Optional.java:159)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.loadContributions(ComponentManagerImpl.java:462)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.registerExtension(ComponentManagerImpl.java:412)
        at org.nuxeo.runtime.model.impl.RegistrationInfoImpl.activate(RegistrationInfoImpl.java:439)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.activateComponent(ComponentManagerImpl.java:547)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.activateComponents(ComponentManagerImpl.java:524)
        at org.nuxeo.runtime.model.impl.ComponentManagerImpl.start(ComponentManagerImpl.java:787)
        at org.nuxeo.runtime.osgi.OSGiRuntimeService.startComponents(OSGiRuntimeService.java:460)
        at org.nuxeo.runtime.osgi.OSGiRuntimeService.frameworkEvent(OSGiRuntimeService.java:475)
        at org.nuxeo.osgi.OSGiAdapter.fireFrameworkEvent(OSGiAdapter.java:232)
        at org.nuxeo.osgi.application.loader.FrameworkLoader.doStart(FrameworkLoader.java:226)
        at org.nuxeo.osgi.application.loader.FrameworkLoader.start(FrameworkLoader.java:125)
        at org.nuxeo.runtime.deployment.NuxeoStarter.start(NuxeoStarter.java:120)
        at org.nuxeo.runtime.deployment.NuxeoStarter.contextInitialized(NuxeoStarter.java:93)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4745)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5207)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:630)
        at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1842)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.nuxeo.common.xmap.XMapException: Cannot load class: org.nuxeo.ecm.directory.api.ui.HierarchicalDirectoryU
IDeleteConstraint
        at org.nuxeo.common.xmap.XValueFactory$10.deserialize(XValueFactory.java:206)
        at org.nuxeo.common.xmap.XAnnotatedMember.getValue(XAnnotatedMember.java:135)
        at org.nuxeo.common.xmap.XAnnotatedMember.process(XAnnotatedMember.java:107)
        at org.nuxeo.common.xmap.XAnnotatedObject.newInstance(XAnnotatedObject.java:104)
        at org.nuxeo.common.xmap.ElementVisitor.visitNode(XAnnotatedList.java:148)
        at org.nuxeo.common.xmap.DOMHelper.visitElements(DOMHelper.java:116)
        at org.nuxeo.common.xmap.DOMHelper.visitNodes(DOMHelper.java:90)
        at org.nuxeo.common.xmap.XAnnotatedList.getValue(XAnnotatedList.java:71)
        at org.nuxeo.common.xmap.XAnnotatedMember.process(XAnnotatedMember.java:107)
        at org.nuxeo.common.xmap.XAnnotatedObject.newInstance(XAnnotatedObject.java:104)
        at org.nuxeo.common.xmap.XMap.loadAll(XMap.java:439)
        at org.nuxeo.common.xmap.XMap.loadAll(XMap.java:445)
        at org.nuxeo.common.xmap.XMap.loadAll(XMap.java:401)
        at org.nuxeo.runtime.model.impl.ExtensionPointImpl.loadContributions(ExtensionPointImpl.java:107)
        ... 28 more
Caused by: java.lang.ClassNotFoundException: org.nuxeo.ecm.directory.api.ui.HierarchicalDirectoryUIDeleteConstraint
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.nuxeo.runtime.osgi.OSGiRuntimeContext.loadClass(OSGiRuntimeContext.java:102)
        at org.nuxeo.runtime.model.impl.XMapContext.loadClass(XMapContext.java:47)
        at org.nuxeo.common.xmap.XValueFactory$10.deserialize(XValueFactory.java:204)
        ... 41 more