Upgrade to Confluence 7.0.1 caused this: There is no Action mapped for namespace

Upgrade to Confluence 7.0.1 caused this: There is no Action mapped for namespace

I found this link but do not know what to do?
https://confluence.atlassian.com/confkb/confluence-states-there-is-no-action-mapped-for-namespace-x-and-action-name-x-296911093.html

And ofcource to my App that I am created.