Describe the bug
When deleting a category, I get an error:

To Reproduce
Try to delete a category element.

Expected behavior
I would expect the category to be deleted, if there are elements associated with it I would like to see this in the message. I tested without associated elements though and still get the error.

Desktop (please complete the applicable information):

• OS: Windows
• Browser Electron
• Version
• iTwin.js Version 4.11