That error simply means that you have a directory that requires Chmoding to 755 or 777 (writable)
If you have other errors such as rendering issues or Template errors at the bottom of the screen thats a different matter
Looks like I finally found one reason some of the skins are not working properly. I did not see this error before, but it is odd. I'll make the area writable but we'll see if everything goes well.
You must make the /applications/core/interface/ckeditor/ckeditor/skins directory writable in order to add themes.
Twilight 4.4.7 is installed on my forum but I've disabled it.
Most of the plugins and applications are not compatible and when typing in the chatbox it has white text on white background.
Sorry to say, but I really regret having bought a 2 year Premium subscription as it is not the first time Sherri fails with the theme updates.