you have to copy the "Download ZIP" URL from the github repository as the URL or download the repository and create a new .zip starting from the top of the "master" diretory. I mean without that directory.
Have a look at the video in this blog post where I install it from github.
you can install modules using updater but the white page above means that you are getting a PHP error. That has to be fixed as it will probably cause other issues down the road. Activate debugging and look in the apache error log for the exact PHP error in order to fix it.