Custom Page Creation Modal

I'm following the solution for creating a custom add post modal here: Custom Page Creation Modal

I'm following this down to a tee and it doesn't seem to add the option in the bar at the top.
I must be overlooking something here.

My user/blueprints/admin/pages/new_post.yaml
I'm literally copying and pasting directly from the the documentation. I have a file named posts in my pages directory which stores all my current posts.

form:
  validation: loose
  fields:
  section:
    type: section
    title: Add Post
  title:
  type: text
  label: Post Title
  validate:
    required: true

folder:
  type: hidden
  default: '@slugify-title'

route:
  type: hidden
  default: /posts

name:
  type: hidden
  default: 'post'

visible:
  type: hidden
  default: ''

blueprint:
  type: blueprint

In the user/config/plugins/admin.yaml

add_modals:
   -
     label: Add Post
     blueprint: admin/pages/new_post
     show_in: bar

I've triple checked my file paths and still no luck.