Steps to reproduce:

1. Log in to back office.
2. Go to Product catalog / Categories.
3. Click on 'three dot's' in content tree for 'Product root Tag'.
4. Click on 'Add'.
5. Being on create a new category form click on 'Change path' button.
6. Verify 'Change path' modal.
7. Click on 'Cancel' button.
8. Verify web browser console output.

Actual result:
See attached screenshots.

1. Categories tree is not loaded in change path modal.
2. JavaScript exception occurs in console

Uncaught TypeError: Cannot read properties of null (reading 'unmount')
    at HTMLDivElement.onCloseModal (ibexa-admin-ui-layout-js.js:67814:16)
    at Object.trigger (event-handler.js:292:15)
    at modal.js:255:20
    at v (index.js:254:5)
    at backdrop.js:93:7
    at v (index.js:254:5)
    at HTMLDivElement.r (index.js:276:5)
    at a (index.js:98:11)
    at index.js:282:7 

Expected result:

1. Change path modal is properly loaded.
2. No exception occurs when user click on 'Cancel' button in console.