[xwiki-users] Macro not not working after upgrade

Hello, we were upgrading from XWiki 3.5 to Version 4. After upgrading successfully a self coded macro does not work anymore whereas all relevant files and contents are at its right place but it simply does not output anything (I don't know if the macro code runs through but does not output anything or if macro is not even executed). Furthermore, the title of our appw/minutes look extremely disturbing and - to be honest - ugly: "platform.appwithinminutes.appHomePageDescriptionHeading" instead of "Projects". What went wrong? Thx and bests, Moritz