Netlify-cms: Markdown Widget "code-block" component => "Field Settings" => "MODE" => "codemirror/..." Cannot find module.

[furcan]

Hi,

I just updated Netlify CMS from v2.9.7 to v2.10.48 to resolve this issue: #3722

But I have another issue on Markdown Widget "code-block" component.

Describe the bug
When I try to select a "mode" from "Field Settings" using the "code-block" component I am getting an error as below. (Screenshots)

To Reproduce

1. Go to a Markdown Widget and select a "code-block" component.
2. Click to "Settings" icon. (right-top)
3. Select a "MODE" from this "Field Settings" modal.
4. Look at the console.

Expected behavior
Maybe a preview as highlighted for this component but have to add the language code to file => e.g. ```js

Screenshots
1- Select a Language

2- Console

---

Applicable Versions:

• Netlify CMS version: 2.10.48
• Git provider: GitHub
• OS: MacOS
• Browser version: Chrome Version 81.0.4044.129 (Official Build) (64-bit)

CMS configuration

```

• label: "YYY"
  name: "yyy"
  folder: "xxx/yyy"
  create: true
  delete: false
  identifier_field: zzz
  fields:
  
  
  
  • {.........}
  
  
  • { required: true, label: "Content", name: "body", widget: "markdown", buttons: ["bold","italic","link","code-block","quote","bulleted-list","numbered-list","heading-two","heading-three","heading-four"], hint: "Content of this YYY", }
  
  

```

[furcan]

if (mode) {
    await Promise.resolve("codemirror/mode/".concat(mode, "/").concat(mode, ".js")).then(s => _interopRequireWildcard(require(s)));
}

[erezrokah]

Hi @furcan, this was merged but not released. The version on master branch is deployed here https://cms-demo.netlify.com/ so you cant test your use case there.

[furcan]

Hi @erezrokah
I have been tested and it seems to be ok.
Thanks for your support.
Have a nice day.