YAMLSyntaxError: Failed to resolve SEQ_ITEM node here at line X, column Y: - yaml

Question

I'm getting this error when trying to run Netlify CMS
Error loading the CMS configuration
Config Errors:
YAMLSyntaxError: Failed to resolve SEQ_ITEM node here at line 10, column 1:
- name: Posts
^^^^^^^^^^^^^^…
Check your config.yml file.
I have checked the syntax and tried different syntax but I still get the same error for somewhere in the config.yml document.
This is the troubled config.yml document:
backend:
name: git-gateway
branch: master
media_folder: src/assets/images
media_library:
name: uploads
collections:
- name: Posts
label: Posts
create: true
folder: "/articles"
slug: articles/{{slug}}
fields:
- {label: Title, name: title, widget: string}
- {label: Publish Date, name: date, widget: datetime}
- {label: Featured Image, name: cover_image, widget: image}
- {label: Body, name: body, widget: markdown}
Here is a link to the files that I am getting the errors from https://drive.google.com/file/d/1OJPKJRgCljxAG5UuUxXkBPPNoUcyJe48/view?usp=sharing

Answer 1

The file you linked uses tabs for indentation. YAML uses spaces, see the spec:
In general, indentation is defined as a zero or more space characters at the start of a line.
To maintain portability, tab characters must not be used in indentation, since different systems treat tabs differently.
You need to convert the tabs to spaces.