Welcome to the ODK forum, @Israelbandawemalume! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
What made you decide to try to install Aggregate instead of trying to install Central?
Please note that Central is now the ODK server and that Aggregate is no longer being supported. Please see this post for more details: