My site is blank after i uninstalled Buddypress

I have a very serious problem. I have recently a theme that makes it possible for my members to create social crowdfunding. But I don't need Buddypress for that. It's not a community anymore. But when I uninstalled Buddypress my whole site just went blank. I cant do anything. I cant even log in anymore. Why is that? I just need it to be a wordpress site without Buddypress now.