When you drag-and-drop an object from search results into the Workflow designer, it is showing the below error.
You are unable to save the object after this error.
The AWI popup/log show this error:
2026-01-15 14:10:10,917 pool-2-thread-44 [ERROR] AUTOMIC:100/<USER>/<DEPARTMENT> node01lsgw0x0k9lcr232n0w9rzf431-0 0000000001000053 [com.uc4.ecc.framework.commons.controls.messageprovider.MessageProvider] - An unexpected error occurred. Further details are available in the logfiles.
com.vaadin.server.ServerRpcManager$RpcInvocationException: Unable to invoke method itemDropped in com.uc4.ecc.widgets.canvas.gwe.gwt.client.ui.rpc.WorkflowServerRpc
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:157)
at com.vaadin.server.ServerRpcManager.applyInvocation(ServerRpcManager.java:114)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocation(ServerRpcHandler.java:432)
at com.vaadin.server.communication.ServerRpcHandler.handleInvocations(ServerRpcHandler.java:397)
<...>
Caused by: java.lang.NullPointerException: Cannot invoke "com.uc4.ecc.ae.commons.controls.objectpicking.IObjectProvider.getSelections()" because the return value of "com.uc4.ecc.ae.commons.controls.objectpicking.ObjectProviderTabSheetController.getCurrentProvider()" is null
at com.uc4.ecc.plugins.ae.perspectives.common.views.editor.WorkflowEditorViewController$1.get(WorkflowEditorViewController.java:232)
at com.uc4.ecc.plugins.ae.perspectives.common.views.editor.WorkflowEditorViewController$1.get(WorkflowEditorViewController.java:227)
at com.uc4.ecc.plugins.ae.perspectives.common.views.editor.gwe.WorkflowEditorContentController.getObjectPickerSelections(WorkflowEditorContentController.java:450)
at com.uc4.ecc.plugins.ae.perspectives.common.views.editor.gwe.WorkflowEditorContentController$4.itemDropped(WorkflowEditorContentController.java:324)
at com.uc4.ecc.widgets.canvas.gwe.eventhandling.EventHandler.itemDropped(EventHandler.java:77)
... 77 common frames omitted
DE181316
A fix for this issue is planned for 24.4.4, currently expected to be released in March of 2026.
Workaround: Objects can still be dragged and dropped from the Object panel > Explorer tab.