vagrant problem - kernel_require.rb:54:in `require': cannot load such file

issue:
C:\Users\Marek
λ vagrant
C:/HashiCorp/Vagrant/embedded/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- vagrant-share/helper/api (LoadError)
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-share-1.1.7/lib/vagrant-share/activate.rb:244:in `<encoded>'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-share-1.1.7/lib/vagrant-share/activate.rb:16:in `RGLoader_load'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-share-1.1.7/lib/vagrant-share/activate.rb:16:in `<top (required)>'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-share-1.1.7/lib/vagrant-share.rb:23:in `block in <class:Plugin>'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:75:in `call'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:75:in `block (2 levels) in help'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/registry.rb:49:in `block in each'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/registry.rb:48:in `each'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/registry.rb:48:in `each'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:69:in `block in help'
        from C:/HashiCorp/Vagrant/embedded/lib/ruby/2.2.0/optparse.rb:917:in `initialize'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:57:in `new'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:57:in `help'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/cli.rb:32:in `execute'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/lib/vagrant/environment.rb:308:in `cli'
        from C:/HashiCorp/Vagrant/embedded/gems/gems/vagrant-1.9.4/bin/vagrant:127:in `<main>'


Solution:

C:\Users\Marek
λ vagrant plugin install vagrant-share --plugin-version 1.1.8
Installing the 'vagrant-share --version '1.1.8'' plugin. This can take a few minutes...
Fetching: vagrant-share-1.1.8.gem (100%)