I am getting below error and fail to load element. I am using
Mac Mojave
Appium version 1.15.1
org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.core.runtime.AssertionFailedException: null argument:)
at org.eclipse.swt.SWT.error(SWT.java:4533)
at org.eclipse.swt.SWT.error(SWT.java:4448)
at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:255)
at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:145)
at org.eclipse.swt.widgets.Display.syncExec(Display.java:4814)
at org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:211)
at com.kms.katalon.composer.components.services.UISynchronizeService.syncExec(UISynchronizeService.java:26)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog$13.refreshTreeElements(MobileRecorderDialog.java:1036)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog$13.run(MobileRecorderDialog.java:1013)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: 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.StructuredViewer.getRawChildren(StructuredViewer.java:1002)
at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:701)
at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1349)
at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:341)
at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:907)
at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:621)
at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$0(AbstractTreeViewer.java:817)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:795)
at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:596)
at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:766)
at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1538)
at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:772)
at org.eclipse.jface.viewers.AbstractTreeViewer.lambda$1(AbstractTreeViewer.java:1523)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1458)
at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:354)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1419)
at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1517)
at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:286)
at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1696)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog$13$3.run(MobileRecorderDialog.java:1039)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4032)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3708)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:165)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:369)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:481)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog.captureObjectAction(MobileRecorderDialog.java:1066)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog.access$16(MobileRecorderDialog.java:994)
at com.kms.katalon.composer.mobile.recorder.components.MobileRecorderDialog$15.widgetSelected(MobileRecorderDialog.java:1146)
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:4256)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1501)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1509)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1313)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4080)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3706)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:818)
at org.eclipse.jface.window.Window.open(Window.java:794)
at com.kms.katalon.composer.mobile.recorder.handlers.OpenIosRecorderHandler.openRecorderDialog(OpenIosRecorderHandler.java:110)
at com.kms.katalon.composer.mobile.recorder.handlers.OpenIosRecorderHandler.execute(OpenIosRecorderHandler.java:95)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:55)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:282)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:264)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.ui.workbench.renderers.swt.DirectContributionItem.executeItem(DirectContributionItem.java:130)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:454)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem$3.handleEvent(AbstractContributionItem.java:482)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4256)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1501)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1509)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1313)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4080)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3706)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.dropdownEvent(AbstractContributionItem.java:430)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem.handleWidgetSelection(AbstractContributionItem.java:441)
at org.eclipse.e4.ui.workbench.renderers.swt.AbstractContributionItem$3.handleEvent(AbstractContributionItem.java:482)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4256)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1501)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1524)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1509)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1313)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4080)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3706)
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 com.kms.katalon.core.application.Application.internalRunGUI(Application.java:173)
at com.kms.katalon.core.application.Application.runGUI(Application.java:163)
at com.kms.katalon.core.application.Application.start(Application.java:82)
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(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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)