This theme conflicts with the Cell theme from AlienWP. When the AlienWP is installed, one gets an update warning saying there is a new version. Then this theme will overwrite, and if a Cell Child is used, the site crashes.
It would be nice if you theme authors did't use the same name. This could be done using an author prefix to the name, especially when the name is so short and common as "cell".
I have also filed a request for fixing this to the AlienWP support forum. I would agreee that it's their responsibility to ensure the WordPress update warning doesn't catch it. So this is informal and plea to use better/longer names for a global namespace, in general.