Clicking XML CodeLens link results in Unhandled event loop exception

In the eclipseide-wild-web-developer-0.11.5-win32.win32.x86_64.zip I get an Unhandled event loop exception when clicking on a <n> reference(s) XML CodeLens link.

Steps to reproduce using the following sample.dtd file:

<!ELEMENT sample (foo, bar)>
<!ELEMENT foo (bar*)>
<!ELEMENT bar (#PCDATA)>

1. In Window > Preferences: XML (Wild Web Developer) > CodeLens tick the Enable XML CodeLens checkbox (see #636)
2. Open sample.dtd file (see above)
3. Klick on the 1 reference (above line 2) or 2 references (above line 3) XML CodeLens link

Result:

• Expected: Any kind of navigation to the clicked reference(s)
• Actual: No navigation; instead, the following Unhandled event loop exception will be logged:

eclipse.buildId=4.18.0.I20201202-1800
java.version=15.0.2
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments:  -product org.eclipse.wildwebdeveloper.product.branding.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.wildwebdeveloper.product.branding.product

org.eclipse.ui
Error
Sun Feb 28 22:18:43 CET 2021
Unhandled event loop exception

java.lang.IllegalArgumentException: The handle object must not have a zero-length identifier
	at org.eclipse.core.commands.common.HandleObjectManager.checkId(HandleObjectManager.java:65)
	at org.eclipse.core.commands.CommandManager.getCommand(CommandManager.java:522)
	at org.eclipse.ui.internal.commands.CommandService.getCommand(CommandService.java:159)
	at org.eclipse.lsp4e.command.CommandExecutor.createEclipseCoreCommand(CommandExecutor.java:212)
	at org.eclipse.lsp4e.command.CommandExecutor.executeCommandClientSide(CommandExecutor.java:185)
	at org.eclipse.lsp4e.command.CommandExecutor.executeCommand(CommandExecutor.java:107)
	at org.eclipse.lsp4e.operations.codelens.LSPCodeMining.performAction(LSPCodeMining.java:79)
	at org.eclipse.jface.text.source.inlined.InlinedAnnotationSupport$MouseTracker.mouseUp(InlinedAnnotationSupport.java:318)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:224)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4209)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1037)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4026)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3626)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1157)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:644)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:551)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:156)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:653)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:590)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1461)

By the way, why it is called CodeLens which is a trademark owned by Microsoft and not Code Minings in Eclipse (see also Eclipse bug 526969 comment 15)?

Mit den Schritten aus sample.dtd und aktiviertem XML CodeLens reproduzieren und anschließend den Klick über LSPCodeMining.performAction und CommandExecutor.executeCommandClientSide/createEclipseCoreCommand aus dem Stack Trace verfolgen. Als abgeschlossen gilt die Aufgabe, wenn das Klicken auf die Referenzlinks keine Ausnahme wegen eines Bezeichners der Länge null mehr auslöst und das erwartete Navigationsverhalten bietet.