Error during the add component process: TypeError: Cannot read properties of undefined

Have attempted to fork this and create the needed change. Have used:

$schema: https://git.drupalcode.org/project/drupal/-/raw/10.1.x/core/modules/sdc/src/metadata.schema.json
name: Fieldset
status: experimental
description: Fieldset
props:
  type: object
  properties:
    attributes:
      type: Drupal\Core\Template\Attribute
      description: The HTML attributes for the fieldset element.
    disabled:
      type: boolean
      description: Boolean indicating whether the fieldset element is disabled.
    errors:
      type: array
      description: Any errors for this fieldset element.
    required:
      type: boolean
      description: Boolean indicating whether the fieldset element is required.
    prefix:
      type: string
      description: The content to add before the fieldset children.
    suffix:
      type: string
      description: The content to add after the fieldset children.
    title_display:
      type: string
      description: The display setting for the title.
    description_display:
      type: string
      description: The display setting for the description.
slots:
  children:
    type: string
    description: The rendered child elements of the fieldset.

for components/fieldset/fieldset.component.yml

Great work as always Martin, merged

This actually prompts me to make sure a lack of Component Schema shouldn't break the drupal-radix-cli, we need to add a safeguard there, maybe do a fix there as well? :)

tagged 1.0.7 for drupal-radix-cli to get around this issue, please do npm update drupal-radix-cli to get the latest version.