404 after Admin Installation

I downloaded the Big Picture Skeleton and extracted the content to a directory on my website.
After that I installed the admin via terminal (bin/gpm install admin). Since I'm expierencing a 404 - The resource requested could not be found on this server!

Is there anything I did wrong?
Help is much appreciated.
Thanks, Daniel

sorry everyone, I fixed this. For some reasons there was no .htaccess file present.

no worries :)