I've no idea what this means. What interface? Do you have a screenshot. Also, according to those errors... it's very possible you have faulted on your directories, ie; you moved something around or applied an update wrong as well as having bad permissions. The update is a simple process that can be done directly from your dashboard... how exactly are you trying to update things?
As @RXWatcher states, that server (just measuring this objectively and according to what I see you have installed) is not going to be able to handle the tasks I would assume you'd want to throw at it. I know your post isn't in regards to this, however, this is just a courtesy to save you a headache later.