[BUG] Cannot read property 'categories' of null

[geromegrignon]

Nature of the issue

When opening the app, the following error is displayed into the devtools and the categories and the checklist items aren't displayed when selecting a project:

Cannot read property 'categories' of null

Current behavior

The content.json is correctly generated based on the content folder but the app doesn't seems to find it.
The categories and the checklist items aren't displayed

Expected behavior

The categories and the checklist items should be displayed

Steps to reproduce the issue

• clone the repository
• run cd examples
• run npx @marmicode/checklist-cli angular-checklist
• run http-server dist/browser
• open http://127.0.0.1:8080

The error is displayed into the devtools

• click on the default card
• there is no category displayed on http://127.0.0.1:8080/default/checklist