Bitbucket Failed to persist entry: API_ERROR: Branch not found

The website is built using Gatsby with Netlify CMS in Bitbucket. The error shows when I tried to change something on the custom page using the Netlify CMS (Live), but works perfectly on the local setup. This confuses me and I don't know what and why is that happening.

Here's my config.yml

backend:
  name: bitbucket
  repo: repo-name
  branch: master
  auth_type: implicit
  app_id: app-id
  commit_messages:
    create: "Create {{collection}} “{{slug}}”"
    update: "Update {{collection}} “{{slug}}”"
    delete: "Delete {{collection}} “{{slug}}”"
    uploadMedia: "[skip ci] Upload “{{path}}”"
    deleteMedia: "[skip ci] Delete “{{path}}”"

local_backend: true
publish_mode: editorial_workflow
media_folder: static/img
public_folder: /img

(Skipped some because it is too long but here is the setup of the custom page)

- name: "pages"
    label: "Pages"
    label_singular: "Page"
    create: true
    files:
  - file: "src/pages/resources/i-mop-xl-operator-resources.md"
    label: "i-mop xl operator resources"
    name: "i-mop xl operator resources"
    fields:
      - {
          label: "Template Key",
          name: "templateKey",
          widget: "hidden",
          default: "i-mop-xl-operator-resources",
        }
      - { label: Title, name: title, widget: string }
      - { label: Heading, name: heading, widget: string }
      - { label: Description, name: description, widget: string }
      - {
          label: "Seo Description",
          name: "seodescription",
          widget: "string",
        }
      - { label: "Seo Keyword", name: "seokeyword", widget: "string" }
      - {
          label: "Seo Title",
          name: "seotitle",
          widget: "string",
          required: false,
        }

And the error is saying

P.S this is only happening on the new pages that I've created.

So I've found the solution to this and I think it is pretty simple. The name should not have a blank space. From this:

- file: "src/pages/resources/i-mop-xl-operator-resources.md"
  label: "i-mop xl operator resources"
  name: "i-mop xl operator resources"

To this:

- file: "src/pages/resources/i-mop-xl-operator-resources.md"
  label: "i-mop xl operator resources"
  name: "i-mop-xl-operator-resources"