The unified document section name is not loading on latest XWiki versions

Prerequisites:

• XWiki v16.10.7
• UDA v1.2.6

Steps to reproduce:

1. Create a section name with dummy name using Section template
2. Create a draft page with empty content using Unified document template
3. In object mode provide a section name in Section names field, from context menu → Add → type name of previous created section or search for it manually

Actual Result

The

documentTree

fails to load, making it impossible for the user to select a section for the document.

Expected Result

The

documentTree

loads correctly, allowing the user to select a section for the document.

Note

That I don't have issue on XWiki 14.10.9 or XWiki 13.10. The issue occurs on LTS version and older version from 16.x branch. I haven't checked behaviour on XWiki 15.x.