form using form_with not loading

127.0.0.1 - - [30/Nov/2019:19:55:21 EST] "GET /items/new?utf8=%E2%9C%93&item%5Bitem_type_id%5D=9&commit=New+item HTTP/1.1" 200 1758
http://localhost:3000/items -> /items/new?utf8=%E2%9C%93&item%5Bitem_type_id%5D=9&commit=New+item

<%= form_with(model: @item, url: new_item_path(@item), method: "get") do |f| %>

 <div class="field">
     <%= f.select :item_type_id, nested_set_options(ItemType.all, @item_type) {|i| "#{'-' * i.level} #{i.name}" }, {:include_blank => "Select"}%>
 </div>

<div class="actions">
    <%= f.submit "New item" %>
</div>

<% end %>