This is a pre 3.8.0 style that you have installed and it doesn't know about the community button. You will have to upgrade the style of hack the navbar code to not display the community button or add it if you can. I would strongly recommend trying to find a 3.8.x version and reinstall it with overwrite or whatever the style maker recommends. Also, you might want to check with Filez about it, he might be able to hack something for you if you ask him.