This is after I've tried deleting Gemfile.lock too:
Bundler could not find compatible versions for gem "sprockets-rails":
In Gemfile:
foundation-icons-sass-rails (>= 0) ruby depends on
sass-rails (>= 3.1.1) ruby depends on
sprockets-rails (~> 2.0.0) ruby
rails (~> 4.2.0.beta2) ruby depends on
sprockets-rails (3.0.0.beta1)
Bundler could not find compatible versions for gem "railties":
In Gemfile:
foundation-icons-sass-rails (>= 0) ruby depends on
sass-rails (>= 3.1.1) ruby depends on
railties (~> 3.1.0) ruby
rails (~> 4.2.0.beta2) ruby depends on
railties (4.2.0.beta2)
This is after I've tried deleting Gemfile.lock too: