Netlify-cms: 'Failed to persist entry' error while trying to save (workflow turned on)

[Jaikant]

- Do you want to request a feature or report a bug?
A bug is what it seems to be ...

- What is the current behavior?
When trying to save an entry (workflow turned on), I am getting an error
Failed to persist entry: TypeError: e.replace is not a function

- If the current behavior is a bug, please provide the steps to reproduce.
I click new entry (blog) and after entering the fields, I click save

- What is the expected behavior?
It should save it.

- Please link or paste your config.yml below if applicable.

backend:
  name: git-gateway
  branch: master

publish_mode: editorial_workflow

media_folder: static/img
public_folder: /img

collections:
  - name: "menuPages"
    label: "Menu Pages"
    folder: "src/pages/"
    create: true
    slug: "{{slug}}"
    fields:
      - {label: "Title", name: "title", widget: "string"}
      - {label: "Publish Date", name: "date", widget: "datetime"}
      - {label: "Description", name: "description", widget: "text"}
      - {label: Image, name: imagepath, widget: image, required: false}
      - {label: "Body", name: "body", widget: "markdown"}

  - name: "blog"
    label: "Blog"
    folder: "src/pages/blog/"
    create: true
    slug: {{slug}}
    fields:
      - {label: "Title", name: "title", widget: "string"}
      - {label: "Publish Date", name: "date", widget: "datetime"}
      - {label: "Description", name: "seodescription", widget: "text"}
      - {label: Image, name: imagepath, widget: image, required: false}
      - {label: "Image Description", name: "imgdesc", widget: "text"}
      - {label: "Body", name: "body", widget: "markdown"}
      - {label: "Tags", name: "tags", widget: "list"}

  - name: "settings"
    label: "Settings"
    create: true
    files:
      - name: "general"
        label: "Site Settings"
        file: "_data/settings.json"
        description: "General Site Settings"
        fields:
          - {label: "Global title", name: "site_title", widget: "string"}
          - label: "Post Settings"
            name: posts
            widget: "object"
            fields:
              - {label: "Number of posts on frontpage", name: front_limit, widget: number}
              - {label: "Default Author", name: author, widget: string}
              - {label: "Default Thumbnail", name: thumb, widget: image, class: "thumb"}

[tech4him1]

Can you try wrapping the "{{slug}}" in quotes for your blog collection (i.e. slug: "{{slug}}")? Because of the curly brackets, it won't parse correctly unless it is quoted.

[Jaikant]

@tech4him1 thanks for your super quick reply! I will test it out and close this issue hopefully :)