I want to add Payupaisa gateway for my shopping cart site. I use spree. I used gem
gem 'spree_payupaisa', :github => "meetdestiny/spree_payupaisa_express", :branch => "2-1-stable"
https://github.com/meetdestiny/spree_payupaisa_express
but it give error while I am updating bundle
Git error: command `git rev-parse 2-1-stable` in directory
/home/tps/.rvm/gems/ruby-2.0.0-p247@demo/cache/bundler/git/spree_payupaisa_express-6aebc199a8cbc824377ffe9416c892e73cc3271e has failed.
Thank in Advance.