2329174 - EP: UI Theme Designer & Blank Display

• After a Portal upgrade a subsequent attempt to activate the UI Theme Designer results in a blank /irj/portal page being encountered.

• SAP NetWeaver 7.3 onwards
• Enterprise Portal

UI Theme Designer, Theme Designer, new theming, old theming, LESS, laf, laf service, theme-designer, theme-editor, com.sap.portal.lessportaldesigndatazip, com.sap.portal.themes.lafservice, portal theme, theme, theme export, theme import, portal display, blank, irj, component, deployment, activation,  Enterprise Portal 7.30, EP 7.30, Enterprise Portal 7.31, EP 7.31, Enterprise Portal 7.40, EP 7.4, Enterprise Portal 7.50, EP 7.5, theme_editor, netweaver_portal, uwl, enterprise_workspaces, restart, ep, portal_on_device, recent, cloud_portal, themes,mobile_portal, less, theme_desktop, fiori, themedesigner, theme_designer, themes;, themedesigner;, theme_designer;,theme_designer;sap_tradeshow_plus, theme_root;theme_designer;webdynpro_abap;sap,theme, uithemedesigner,theme_parameter, theme_designer_for_sap_fiori, theme_parameter_missing, portaltheme, epbasis, themes_genrator, themeeditor,theme-designer, theme_designersap_tradeshow_plus, themeditor, theme_roottheme_designerwebdynpro_abapsaptheme,theme_roottheme_designerwebdynpro_abapsapthemesap_solution_manager, themenkatalog, theme_, blankdisplay, portaldisplay , KBA , EP-PIN-TOL , Themes / Portal UI Theme Designer / Theme Editor , Problem