Cocoon link_to_add_association : ArgumentError: wrong number of arguments (2 for 1)

Question

I am integrating Cocoon to add multiple attachment with my property object.

But when I am creating new property record, I am getting ArgumentError: wrong number of arguments (2 for 1) error

= form_for @property, remote: true, authenticity_token: true, html: { class: "form-horizontal", multipart: true } do |f|
 .links
   = link_to_add_association 'Add', f, :attachments
 .modal-footer
   .actions
     %button.btn.btn-default{"data-dismiss" => "modal", :type => "button"} Close
     = f.submit 'Save',  class: 'btn btn-warning'

/gems/cocoon-1.2.9/lib/cocoon/view_helpers.rb i.e. before new_object = create_object(f, association, force_non_association_create)

[1] pry(#<#<Class:0x0000000b46f630>>)> create_object(f, association, force_non_association_create)

ActionView::Template::Error (wrong number of arguments (2 for 1)):
   1: = form_for @property, remote: true, authenticity_token: true, html: { class: "form-horizontal", multipart: true } do |f|
   2:   .links
   3:     = link_to_add_association 'Add', f, :attachments
   4:   .modal-footer
   5:     .actions
   6:       %button.btn.btn-default{"data-dismiss" => "modal", :type => "button"} Close
 app/views/properties/_form.html.haml:3:in `block in _app_views_properties__form_html_haml___4571956341154479101_90407280' 

from /home/dev05/.rvm/gems/ruby-2.2.2@me_backend/gems/activerecord-4.2.5.1/lib/active_record/attribute_methods/query.rb:35:in `attribute?'

I have models

class Property < ActiveRecord::Base
 has_many :attachments, as: :attached_item, dependent: :destroy
 accepts_nested_attributes_for :attachments,allow_destroy: true
end

class Attachment < ActiveRecord::Base
 belongs_to :attached_item, polymorphic: true
end

Gem versions

rails version '4.2.5.1'
ruby version '2.2.2'
cocoon (1.2.9)

Gemfile.lock file snapshot

activerecord (4.2.5.1)
   activemodel (= 4.2.5.1)
   activesupport (= 4.2.5.1)
   arel (~> 6.0)  rails (4.2.5.1)
   actionmailer (= 4.2.5.1)
   actionpack (= 4.2.5.1)
   actionview (= 4.2.5.1)
   activejob (= 4.2.5.1)
   activemodel (= 4.2.5.1)
   activerecord (= 4.2.5.1)
   activesupport (= 4.2.5.1)
   bundler (>= 1.3.0, < 2.0)
   railties (= 4.2.5.1)
   sprockets-rails

Can someone please help me to identify that what is causing issue to not creating the attachment.