java.lang.IllegalStateException: both query and delegate are null
at io.jmix.ui.model.impl.CollectionLoaderImpl._load(CollectionLoaderImpl.java:82) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.model.impl.CollectionLoaderImpl.load(CollectionLoaderImpl.java:75) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.component.dataloadcoordinator.OnFrameOwnerEventLoadTrigger.load(OnFrameOwnerEventLoadTrigger.java:48) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.component.dataloadcoordinator.OnFrameOwnerEventLoadTrigger.lambda$new$0(OnFrameOwnerEventLoadTrigger.java:39) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.core.common.event.EventHub.publish(EventHub.java:170) ~[jmix-core-1.5.2.jar:na]
at io.jmix.ui.screen.Screen.fireEvent(Screen.java:124) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.screen.UiControllerUtils.fireEvent(UiControllerUtils.java:58) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.sys.ScreensImpl.fireScreenBeforeShowEvent(ScreensImpl.java:1364) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.sys.ScreensImpl.show(ScreensImpl.java:357) ~[jmix-ui-1.5.2.jar:na]
at io.jmix.ui.screen.Screen.show(Screen.java:306) ~[jmix-ui-1.5.2.jar:na]
……