Thread:Project:Support desk/WikiEditor will not displayed after upgrade/reply (13)

Well done! :) That was the problem. Removing Extension:Vector solved the problem. Thank you very much.

Can you also tell me how to solve the following problem? When I go to Preferences at Wikipedia I am able to create a custom CSS/JS-file for each skin. In my own Wiki there is only (default | Preview) behind each skin, but no option to create a custom CSS/JS-file. Do I need an extension? Best regards