You must disable the html-migration macro provided in the Atlassian bundled Confluence Html Macros plugin under System Plugins in order to avoid Unknown Macro errors when inserting wiki markup with the html macro. Or surround with the wiki macro or any other non-migrated (compatibility mode) macro. Unfortunately, Atlassian ships the html-migration macro as enabled even though their html macro is disabled. This causes any html macro to be migrated without a supporting macro . See CONF-25656. html macro works in compatibility mode for releases before 4.0.0 - see Confluence 4.0 compatibility for Table and other plugins |