can't open Groovy console under Java 11 in 2.11

Opening the Groovy Console raises the following exception:
WARNING: Illegal reflective access by org.codehaus.groovy.vmplugin.v7.Java7$1 (file:/Users/jprocter/git/jalview/build/libs/jalview-all-11.jar) to constructor java.lang.invoke.MethodHandles$Lookup(java.lang.Class,int)
WARNING: Please consider reporting this to the maintainers of org.codehaus.groovy.vmplugin.v7.Java7$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: groovy/swing/SwingBuilder
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3167)
at java.base/java.lang.Class.privateGetPublicMethods(Class.java:3192)
at java.base/java.lang.Class.getMethods(Class.java:1905)
at java.desktop/com.sun.beans.introspect.MethodInfo.get(MethodInfo.java:71)
at java.desktop/com.sun.beans.introspect.ClassInfo.getMethods(ClassInfo.java:71)
at java.desktop/java.beans.Introspector.getTargetMethodInfo(Introspector.java:1046)
at java.desktop/java.beans.Introspector.getBeanInfo(Introspector.java:462)
at java.desktop/java.beans.Introspector.getBeanInfo(Introspector.java:205)
at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:3356)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:3354)
at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:3331)
at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:287)
at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:329)
at org.codehaus.groovy.runtime.callsite.ClassMetaClassGetPropertySite.<init>(ClassMetaClassGetPropertySite.java:37)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.createClassMetaClassGetPropertySite(AbstractCallSite.java:379)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.createGetPropertySite(AbstractCallSite.java:327)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.acceptGetProperty(AbstractCallSite.java:314)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:298)
at groovy.ui.Console.<clinit>(Console.groovy:187)
at jalview.gui.Desktop.openGroovyConsole(Desktop.java:2707)
at jalview.gui.Desktop.groovyShell_actionPerformed(Desktop.java:2688)
at jalview.jbgui.GDesktop$23.actionPerformed(GDesktop.java:400)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1967)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2308)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:369)
at java.desktop/com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:129)
at java.desktop/java.awt.MenuItem.processActionEvent(MenuItem.java:690)
at java.desktop/java.awt.MenuItem.processEvent(MenuItem.java:649)
at java.desktop/java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:375)
at java.desktop/java.awt.MenuComponent.dispatchEvent(MenuComponent.java:363)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:775)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.ClassNotFoundException: groovy.swing.SwingBuilder
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 51 more