I am trying to add new column to Dashboard View in SDL Web 8.5 and following the instructions provided by SDL here
Event handler is working as expected and is adding custom attribute ext:ExpirationDate the value to response when GetList is invoked.
Issue seems to be with the namespace 'http://www.tridion.com/ContentManager/R5/Extension' which is not recognized; although it has been configured in GUI extension configuration.
I was able to resolve the issue by directly adding adding namespace to \web\WebUI\Editors\CME\Xml\ListDefinitions\ListItems.xml
Am I missing any step? Any help would be appreciated. We do not want to update any out of the box configuration.