Views Responsive Grids is already been added to Drupal core 8
Problem is with Responsive Bartik D7
for it with Views Responsive Grids
In order for the columns to work you'll need to specify the class name of your columns. For example, if your theme utilizes a grid, like Twitter Bootstrap does, you would specify "span3"
I don't think Responsive Bartik D7 has class name for columns
such as bootstrap
I hope that's helpful :)