ActionController::InvalidAuthenticityToken in RoomMessagesController#create

[GraiemBell]

trafficstars

Can't verify CSRF token authenticity.

Extracted source (around line #293):

    def handle_unverified_request
      raise ActionController::InvalidAuthenticityToken, warning_message
    end
  end
end

Rails.root: E:/RoR/conv

[GraiemBell]

how can I fix this error I need your help