I had this in my wordpress, i activated it in the plugin's. When i tried to put in my own colour scheme and error came up. I logged out of my site and when i tried to log back in again i couldn't even get back in, a white page appeared with an error code. The only i could get back in to my admin was to delete the plugin in my smart ftp. I'm only writing this to warn other's in case the same thing happens again.