Form with remote: true still send as HTML

[Merff]

Rails 5 and carrierwave I add:

gem 'remotipart', '~> 1.3.1'

and

//= require jquery.remotipart

I have the form:

= simple_form_for state, remote: true do |f|
  = f.input :wsr

The output for that form:

<form class="simple_form" novalidate="novalidate" id="edit_odc_state_73" enctype="multipart/form-data" action="/odc_states/73" accept-charset="UTF-8" data-remote="true" method="post">

But when i submit form:

Started PATCH "/odc_states/73" for 127.0.0.1 at 2016-12-29 16:02:56 +0700
Processing by OdcStatesController#update as HTML
  Parameters: {"utf8"=>"✓", "odc_state"=>{"wsr"=>#<ActionDispatch::Http::UploadedFile:0x007f67ba393338 @tempfile=#<Tempfile:/tmp/RackMultipart20161229-10725-1r3sn5z.txt>, @original_filename="test1.txt", @content_type="text/plain", @headers="Content-Disposition: form-data; name=\"odc_state[wsr]\"; filename=\"test1.txt\"\r\nContent-Type: text/plain\r\n">}, "id"=>"73"}
Can't verify CSRF token authenticity.
Completed 422 Unprocessable Entity in 1ms (ActiveRecord: 0.0ms)
  
ActionController::InvalidAuthenticityToken (ActionController::InvalidAuthenticityToken):

Why send as HTML, any ideas ?