The problem occurs on this site: http://honorarberatung-hannover.de
I updated to X v6.0.4. Before the update (v5) the Content Dock was working fine. After the update the Content Dock disappeared from front end. I have no cache plugins installed.
I have deleted the Content Dock plugin and reinstalled via X’s Validation page. Then I clicked the “Go Activate” button. But after I activated the Content Dock plugin, X Theme says it is not installed (in Validation page it offers me to install the plugin although it is already installed and activated). Other plugins survived the major update without problems. But Content Dock seems not. Any further suggestions would be much appreciated.