我想将Vaadin Project中的普通文件夹转换为网络文件夹，当我尝试使用
File -> Project Structure但这不会弹出项目结构窗口。这是IntelliJ日志：
com/intellij/ui/TitledSeparatorWithMnemonic
java.lang.NoClassDefFoundError: com/intellij/ui/TitledSeparatorWithMnemonic
at facet.VaadinFacetConfiguration.createEditorTabs(VaadinFacetConfiguration.java:38)
at com.intellij.facet.impl.ui.FacetEditorImpl.<init>(FacetEditorImpl.java:58)
at com.intellij.facet.impl.ProjectFacetsConfigurator.getOrCreateEditor(ProjectFacetsConfigurator.java:189)
at com.intellij.facet.impl.ui.facetType.FacetTypeEditor.a(FacetTypeEditor.java:86)
at com.intellij.facet.impl.ui.facetType.FacetTypeEditor.createComponent(FacetTypeEditor.java:100)
at com.intellij.openapi.roots.ui.configuration.projectRoot.FacetTypeConfigurable.createOptionsPanel(FacetTypeConfigurable.java:54)
at com.intellij.openapi.ui.NamedConfigurable.createComponent(NamedConfigurable.java:85)
at com.intellij.openapi.ui.MasterDetailsComponent.updateSelection(MasterDetailsComponent.java:696)
at com.intellij.openapi.roots.ui.configuration.projectRoot.FacetStructureConfigurable.updateSelection(FacetStructureConfigurable.java:341)
at com.intellij.openapi.ui.MasterDetailsComponent.setSelectedNode(MasterDetailsComponent.java:687)
at com.intellij.openapi.ui.MasterDetailsComponent.updateSelectionFromTree(MasterDetailsComponent.java:262)
at com.intellij.openapi.ui.MasterDetailsComponent.reset(MasterDetailsComponent.java:407)
at com.intellij.openapi.roots.ui.configuration.projectRoot.BaseStructureConfigurable.reset(BaseStructureConfigurable.java:279)
at com.intellij.openapi.roots.ui.configuration.projectRoot.FacetStructureConfigurable.reset(FacetStructureConfigurable.java:229)
at com.intellij.openapi.roots.ui.configuration.ProjectStructureConfigurable.reset(ProjectStructureConfigurable.java:371)
at com.intellij.openapi.options.ex.SingleConfigurableEditor.<init>(SingleConfigurableEditor.java:66)
at com.intellij.openapi.options.ex.SingleConfigurableEditor.<init>(SingleConfigurableEditor.java:89)
at com.intellij.openapi.options.ex.SingleConfigurableEditor.<init>(SingleConfigurableEditor.java:104)
at com.intellij.ide.actions.ShowStructureSettingsAction$1.<init>(ShowStructureSettingsAction.java:48)
at com.intellij.ide.actions.ShowStructureSettingsAction.actionPerformed(ShowStructureSettingsAction.java:48)