Buddypress home page - How to edit

How do I edit my home page in Buddy Press? I am using it with Membership and at the moment the page says "Not Found

Sorry, but you are looking for something that isn't here." and a search box is next to it.

I just want to have a page where I can input my own text etc.

I know how to edit all the other pages but can't find how to do the home page.

Thanks