undefined method `form_buffers' for #<ActiveAdmin::FormBuilder:0x007fbad1122da0>

[railsfactory-bhaskararao]

Hi,

I am using activeadmin (1.0.0.pre1) which is compatible to activeadmin-seo. When I followed documentation unmantained-activeadmin-plugins/activeadmin-seo. I got above bug at the step

ActiveAdmin.register Page do
form do |f|
# ...
f.seo_meta_inputs
# ...
end
end

my code:

form do |f|
f.inputs "User Details" do
f.input :first_name
f.input :last_name
f.input :email
f.input :phone
f.input :paypal_email
f.input :country
f.input :namer if user.namer? || user.new_record?
f.input :namer_status_id, :as => :select, :collection => NamerStatus.all.map{|u| [u.name, u.id]} if user.namer? || user.new_record?
f.input :family if user.family? || user.new_record?
f.input :password
f.input :password_confirmation
f.seo_meta_inputs
end
f.actions
end
Can someone tell me how to fix this?