Which Community version have you installed? Presumably you've not made any modifications or customizations? You shouldn't need to do anything else here, this should just work out-of-the-box so it would be good to understand what has happened.
I'd like to help here, but I'm not sure what to suggest... where are you seeing the error messages (is this in the browser console or in server logs?). This is such a primary use case that I'm sure it would have been more heavily reported if it was an issue and I'm not aware of any problems with creating site in that release.