Free trial not working

I get this error message: I have testing out your plugin on a local host and this is my first time!
This local development site url has previously been registered with WPMU DEV by the user Collin(c****h@hostanywhere.com). To use this site url, login with the original user or upgrade your trial to a full membership. Alternatively, try a more uniquely named development site url. Contact support if you need further assistance.