Can't open .ecore file with empty name

[sgraband]

If an ecore file contains a element that has an empty name, the diagram cannot be opened.

Error:

Expecting @ at index 0 of ''
java.lang.IllegalArgumentException: Expecting @ at index 0 of ''
	at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eObjectForURIFragmentSegment(BasicEObjectImpl.java:510)
	at org.eclipse.emf.ecore.impl.EModelElementImpl.eObjectForURIFragmentSegment(EModelElementImpl.java:477)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:811)
	at org.eclipse.emf.ecore.resource.impl.ResourceImpl.getEObject(ResourceImpl.java:787)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.reResolved(EcoreFacade.java:180)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.resolved(EcoreFacade.java:176)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.lambda$findUnresolvedElements$4(EcoreFacade.java:114)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176)
	at java.base/java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(AbstractList.java:720)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.findUnresolvedElements(EcoreFacade.java:115)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.getOrCreateDiagram(EcoreFacade.java:80)
	at org.eclipse.emfcloud.ecore.glsp.EcoreFacade.getDiagram(EcoreFacade.java:72)
	at org.eclipse.emfcloud.ecore.glsp.model.EcoreModelFactory.loadModel(EcoreModelFactory.java:39)
	at org.eclipse.glsp.server.actionhandler.RequestModelActionHandler.executeAction(RequestModelActionHandler.java:39)
	at org.eclipse.glsp.server.actionhandler.RequestModelActionHandler.executeAction(RequestModelActionHandler.java:31)
	at org.eclipse.glsp.server.actionhandler.BasicActionHandler.execute(BasicActionHandler.java:47)
	at org.eclipse.glsp.server.action.DefaultActionProcessor.dispatch(DefaultActionProcessor.java:52)
	at org.eclipse.glsp.api.action.ActionProcessor.process(ActionProcessor.java:35)
	at org.eclipse.glsp.api.action.ActionProcessor.process(ActionProcessor.java:46)
	at org.eclipse.glsp.server.jsonrpc.DefaultGLSPServer.process(DefaultGLSPServer.java:96)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.lambda$null$0(GenericEndpoint.java:65)
	at org.eclipse.lsp4j.jsonrpc.services.GenericEndpoint.notify(GenericEndpoint.java:152)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.handleNotification(RemoteEndpoint.java:220)
	at org.eclipse.lsp4j.jsonrpc.RemoteEndpoint.consume(RemoteEndpoint.java:187)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.handleMessage(StreamMessageProducer.java:194)
	at org.eclipse.lsp4j.jsonrpc.json.StreamMessageProducer.listen(StreamMessageProducer.java:94)
	at org.eclipse.lsp4j.jsonrpc.json.ConcurrentMessageProcessor.run(ConcurrentMessageProcessor.java:113)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:830)

Typing in an empty name will be prevented by the model validation #27. However you should still be able to open the diagram, in case you created the model in another editor.

Edit: The problem is with the enotation file containing the empty name.