EDIT

Exception when select and deselect all entries of a vocabulary in Distribution Selection Wizard:

last remote method : https://api.cybertaxonomy.org:443/caryophyllales_spp/remoting/term.service
last remote request client time : 2022-09-08T14:10:04.445
last remote request response header time : Thu, 08 Sep 2022 12:06:31 GMT
client error time : 2022-09-08T14:10:04.514
login : w.berendsohn
editor version : 5.32.0
server : api.cybertaxonomy.org (cybertaxonomy.org) / caryophyllales_spp
schema version : 5.32.0.0.20220807
os : Windows 10 10.0 amd64
java : 1.8.0_321
org.eclipse.core.runtime.AssertionFailedException: null argument:
                at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:85)
                at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:73)
                at org.eclipse.jface.viewers.StructuredViewer.assertElementsNotNull(StructuredViewer.java:586)
                at org.eclipse.jface.viewers.CheckboxTreeViewer.setCheckedElements(CheckboxTreeViewer.java:469)
                at eu.etaxonomy.taxeditor.preference.wizard.CdmCheckBoxTreeViewer.handleTreeExpand(CdmCheckBoxTreeViewer.java:33)
                at org.eclipse.jface.viewers.AbstractTreeViewer$3.treeExpanded(AbstractTreeViewer.java:1505)
                at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:133)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1103)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1088)
                at org.eclipse.swt.widgets.Tree.wmNotifyChild(Tree.java:7705)
                at org.eclipse.swt.widgets.Control.wmNotify(Control.java:5825)
                at org.eclipse.swt.widgets.Composite.wmNotify(Composite.java:2048)
                at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:5379)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4855)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
                at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2446)
                at org.eclipse.swt.widgets.Tree.callWindowProc(Tree.java:1552)
                at org.eclipse.swt.widgets.Tree.WM_LBUTTONDOWN(Tree.java:6559)
                at org.eclipse.swt.widgets.Control.windowProc(Control.java:4835)
                at org.eclipse.swt.widgets.Tree.windowProc(Tree.java:6074)
                at org.eclipse.swt.widgets.Display.windowProc(Display.java:5110)
                at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
                at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2552)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3822)
                at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
                at org.eclipse.jface.window.Window.open(Window.java:794)
                at eu.etaxonomy.taxeditor.editor.view.checklist.e4.DistributionEditor$3.widgetSelected(DistributionEditor.java:450)
                at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:249)
                at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
                at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4418)
                at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1079)
                at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4236)
                at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3824)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)
                at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)
                at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:693)
                at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)
                at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:610)
                at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)
                at eu.etaxonomy.taxeditor.Application.start(Application.java:20)
                at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
                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:388)
                at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)
                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
                at java.lang.reflect.Method.invoke(Unknown Source)
                at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)
                at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)
                at org.eclipse.equinox.launcher.Main.run(Main.java:1519)