BUG: React Custom UI `Modal` Unable to display `Code`

### GrapesJS version

- [X] I confirm to use the latest version of GrapesJS

### What browser are you using?

130.0.6723.117

### Reproducible demo link

https://stackblitz.com/edit/grapesjs-react-custom-ui?file=src%2FApp.tsx

### Describe the bug

**How to reproduce the bug?**
1. open https://grapesjs-react-custom-ui.stackblitz.io/
2. click this button

4. no code to show in `Modal`

**What is the expected behavior?**
show code in `Modal`

**What is the current behavior?**
no code to show in `Modal`

### Code of Conduct

- [X] I agree to follow this project's Code of Conduct