Nov 20, 2018 8:43:59 AM com.vaadin.server.VaadinServlet serveStaticResourcesInVAADIN
INFO: Requested resource [/VAADIN/about-app.css] not found from filesystem or through class loader. Add widgetset and/or theme JAR to your classpath or add files to WebContent/VAADIN folder.
Nov 20, 2018 8:44:04 AM com.vaadin.server.DefaultErrorHandler doDefault
SEVERE: 
java.lang.StackOverflowError
        at java.lang.reflect.Method.equals(Method.java:319)
        at java.util.HashMap.putVal(HashMap.java:635)
        at java.util.HashMap.put(HashMap.java:612)
        at java.util.HashSet.add(HashSet.java:220)
        at java.util.AbstractCollection.addAll(AbstractCollection.java:344)
        at java.util.HashSet.<init>(HashSet.java:120)
        at com.thoughtworks.proxy.toys.dispatch.DispatchingInvoker.<init>(DispatchingInvoker.java:68)
        at com.thoughtworks.proxy.toys.dispatch.Dispatching.build(Dispatching.java:55)
        at com.thoughtworks.proxy.toys.dispatch.Dispatching.access$400(Dispatching.java:28)
        at com.thoughtworks.proxy.toys.dispatch.Dispatching$DispatchingBuild.build(Dispatching.java:104)
        at info.magnolia.i18nsystem.proxytoys.ProxytoysI18nizer.injectParentableInterface(ProxytoysI18nizer.java:112)
        at info.magnolia.i18nsystem.proxytoys.ProxytoysI18nizer.decorateChild(ProxytoysI18nizer.java:102)
        at info.magnolia.i18nsystem.proxytoys.ChildDecorator$ChildDecoratorFunction.apply(ChildDecorator.java:89)
        at com.google.common.collect.Maps$7.transformEntry(Maps.java:2023)
        at com.google.common.collect.Maps$10.getValue(Maps.java:2068)
        at com.google.common.collect.Maps$EntryFunction$2.apply(Maps.java:104)
        at com.google.common.collect.Maps$EntryFunction$2.apply(Maps.java:100)
        at com.google.common.collect.Iterators$6.transform(Iterators.java:820)
        at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
        at info.magnolia.enterprise.about.app.JiraSubApp$2.onCancel(JiraSubApp.java:157)
        at info.magnolia.ui.dialog.formdialog.FormDialogPresenterImpl.onCancel(FormDialogPresenterImpl.java:240)
        at info.magnolia.ui.dialog.BaseDialogPresenter$2.onDialogClose(BaseDialogPresenter.java:139)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.lambda$close$0(ResurfaceDialogViewImpl.java:91)
        at java.lang.Iterable.forEach(Iterable.java:75)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.close(ResurfaceDialogViewImpl.java:91)
        at info.magnolia.ui.dialog.BaseDialogPresenter.closeDialog(BaseDialogPresenter.java:117)
        at info.magnolia.enterprise.about.app.JiraSubApp$2.onCancel(JiraSubApp.java:159)
        at info.magnolia.ui.dialog.formdialog.FormDialogPresenterImpl.onCancel(FormDialogPresenterImpl.java:240)
        at info.magnolia.ui.dialog.BaseDialogPresenter$2.onDialogClose(BaseDialogPresenter.java:139)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.lambda$close$0(ResurfaceDialogViewImpl.java:91)
        at java.lang.Iterable.forEach(Iterable.java:75)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.close(ResurfaceDialogViewImpl.java:91)
        at info.magnolia.ui.dialog.BaseDialogPresenter.closeDialog(BaseDialogPresenter.java:117)
        at info.magnolia.enterprise.about.app.JiraSubApp$2.onCancel(JiraSubApp.java:159)
        at info.magnolia.ui.dialog.formdialog.FormDialogPresenterImpl.onCancel(FormDialogPresenterImpl.java:240)
        at info.magnolia.ui.dialog.BaseDialogPresenter$2.onDialogClose(BaseDialogPresenter.java:139)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.lambda$close$0(ResurfaceDialogViewImpl.java:91)
        at java.lang.Iterable.forEach(Iterable.java:75)
        at info.magnolia.ui.dialog.ResurfaceDialogViewImpl.close(ResurfaceDialogViewImpl.java:91)
: