Importing csv with 55 line Roo calls ActionDispatch :: Cookies :: CookieOverflow

I am using roo-rb / roo to import CSV data files into my database. But with 55 rows, 4 columns, I am getting ActionDispatch :: Cookies :: CookieOverflow error. Does anyone know what might be causing this or what would be trying to create this cookie that I think is maximizing?

Here is my import function:

  def self.import(file)
    result = {
        errors: 0,
        success: 0,
        row_results: { }
    }

    spreadsheet = open_spreadsheet(file)
    header = spreadsheet.row(1)

    transaction do
      (2..spreadsheet.last_row).each do |i|
        row = Hash[[header, spreadsheet.row(i)].transpose]

        file_row_hash = row.to_hash
        first_name = file_row_hash['first_name']
        last_name = file_row_hash['last_name']
        company_name = file_row_hash['company_name']
        email = file_row_hash['email']
        company = Company.new(:name => company_name)

        if company.save
          password = Devise.friendly_token.first(8)
          user = StaffMember.new({ :email => email, :encrypted_password => password, :first_name => first_name, :last_name => last_name, :company_id => company.id })

          if user.save
            result[:success] += 1
            result[:row_results][i] = "row #{i}: #{company['name']} and #{company['first_name']} + #{company['last_name']} was successfully created"
          else
            result[:errors] += 1
            result[:row_results][i] = "row #{i}: #{company['name']} saved BUT staff_member #{company['first_name']} + #{company['last_name']} failed to save"
          end
        else
          result[:errors] += 1
          result[:row_results][i] = "row #{i}: #{company['name']} and #{company['first_name']} + #{company['last_name']} failed to be created."
        end
      end
    end
    return result
  end