Cannot retrieve custom Netlify CMS collections in Jekyll - jekyll

Question

I created a new Netlify CMS website based on Jekyll and created new collections workshop and consultant
With the Netlify CMS interface, I can see, add, edit and delete the new collections, but I cannot retrieve them in the view.
--/_consultants
name.md
--/_workshops
title.md
config.yml
collections:
# WORKSHOPS
- name: "workshop" # Used in routes, ie.: /admin/collections/:slug/edit
label: "Workshop" # Used in the UI, ie.: "New Post"
folder: "_workshops" # The path to the folder where the documents are stored
sort: "title:desc" # Default is title:asc
create: true # Allow users to create new documents in this collection
slug: "{{slug}}"
output: true
permalink: /wokshop/:title
fields: # The fields each document in this collection have
- {label: "Title", name: "title", widget: "string", tagname: "h1"}
- label: "Consultant"
name: "consultant"
widget: "relation"
collection: "consultant"
searchFields: ["name"]
valueField: "name"
- {label: "Location", name: "location", widget: "string"}
- {label: "Duration", name: "duration", widget: "string"}
- label: "Category"
name: "category"
widget: "select"
options: ["Business", "Team & Culture", "Design"]
- {label: "Price", name: "price", widget: "string", required: false}
- {label: "Permalink", name: "permalink", widget: "hidden"}
- {label: "Blurb", name: "ws-blurb", widget: "string"}
- {label: "Description", name: "ws-description", widget: "markdown"}
# CONSULTANTS
- name: "consultant" # Used in routes, ie.: /admin/collections/:slug/edit
label: "Consultant" # Used in the UI, ie.: "New Post"
folder: "_consultants" # The path to the folder where the documents are stored
sort: "date:desc" # Default is title:asc
create: true # Allow users to create new documents in this collection
slug: "{{slug}}"
identifier_field: name
output: true
fields: # The fields each document in this collection have
- {label: "Permalink", name: "permalink", widget: "hidden"}
- {label: "Name", name: "name", widget: "string", tagname: "h1"}
- label: "Image"
name: "image"
widget: "image"
# default: "/uploads/chocolate-dogecoin.jpg"
media_library:
config:
multiple: false
- {label: "Bio", name: "bio", widget: "markdown"}
- {label: "References", name: "references", widget: "markdown"}
- {label: "Link", name: "link", widget: "string"}
- {label: "Workshops hosted", name: "ws-hosted", widget: "number"}
When I try to retrieve the newly created workshops and consultants I can't get it to work:
<ul>
{% for item in site.workshops %}
<li>
<h2>
{{ item.title }}
</h2>
</li>
{% endfor %}
</ul>
And when I try to debug the object, it returns NULL: {{ site.workshops | jsonify }}
What confuses me the most is that I can access the collections through the admin interface, but for the last 4 hours I failed at retrieving them in the view.
What am I missing?

Answer 1

I found the solution! So for anyone getting stuck at this point: the information below has to go to _config.yml and not (!) to config.yml
collections:
workshops:
output: true
consultants:
output: true