NPE when logging to AdminUI

Reported against unity 2.2.0 but seems likely that also 2.4.0 is affected

java.lang.NullPointerException: null
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesTable.restartEntitiesLoading(IdentitiesTable.java:630) ~[unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesTable.setInput(IdentitiesTable.java:498) ~[unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesComponent.setGroup(IdentitiesComponent.java:380) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesComponent.access$500(IdentitiesComponent.java:72) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesComponent$11.handleEvent(IdentitiesComponent.java:321) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.identities.IdentitiesComponent$11.handleEvent(IdentitiesComponent.java:317) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webui.bus.EventsBus.fireEvent(EventsBus.java:56) [unity-server-web-common-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.attributetype.AttributeTypesComponent.refresh(AttributeTypesComponent.java:151) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at pl.edu.icm.unity.webadmin.attributetype.AttributeTypesComponent.<init>(AttributeTypesComponent.java:140) [unity-server-web-admin-2.2.0.jar:?]}}
{{ at sun.reflect.GeneratedConstructorAccessor458.newInstance(Unknown Source) [?:1.8.0_161]}}
{{ at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [?:1.8.0_161]}}
[....]{{ at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1078) [spring-context-4.3.10.RELEASE.jar:4.3.10.RELEASE]
at pl.edu.icm.unity.webui.VaadinUIProvider.createInstance(VaadinUIProvider.java:90) [unity-server-web-common-2.2.0.jar:?]
at com.vaadin.server.communication.UIInitHandler.getBrowserDetailsUI(UIInitHandler.java:191) [vaadin-server-7.6.4.jar:7.6.4]
at com.vaadin.server.communication.UIInitHandler.synchronizedHandleRequest(UIInitHandler.java:74) [vaadin-server-7.6.4.jar:7.6.4]
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:41) [vaadin-server-7.6.4.jar:7.6.4]
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1409) [vaadin-server-7.6.4.jar:7.6.4]
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:364) [vaadin-server-7.6.4.jar:7.6.4]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet-api-3.1.0.jar:3.1.0]}}