Bootstrap-sass gem version issues

After I exec rails g react_on_rails:install -R, gemfile has new line: gem 'bootstrap-sass'. Then I run server, got some error: File to import not found or unreadable: bootstrap-sprockets.

I found bootstrap-sass gem version is 3.1.1 in Gemfile.lock.

I specify bootstrap-sass with newest version 3.3.6, then everything is well.

Is there some problem with bootstrap-sass 3.1.1 version?

thx.

@wall2flower What version of Rails are you using? Can you publish a small reproduction case to Github?