Random "exception in macro" error related to Main.WebHome when creating a page

Steps to reproduce

1. Go to Main.WebHome
2. Click 'Create' button
3. On the Location, click on 'Edit the new location' (Pencil) button
4. Insert a non existing parent
5. Insert a page name
6. Click 'Create' button

Expected results

No errors are displayed in the logs.

Actual results

The following stacktrace is displayed:

2026-03-04 14:38:38,425 [http-nio-1115-exec-9 - http://localhost:1115/xwiki/bin/get/Main/WebHome?] ERROR o.a.v.d.null                   - Exception in macro #rawResponse called at <unknown template>[line 2998, column 1]
2026-03-04 14:38:38,425 [http-nio-1115-exec-9 - http://localhost:1115/xwiki/bin/get/Main/WebHome?] ERROR o.a.v.d.null                   - Exception in macro #jsonResponse called at xwiki:XWiki.DocumentTreeMacros[line 103, column 1]
2026-03-04 14:38:38,425 [http-nio-1115-exec-9 - http://localhost:1115/xwiki/bin/get/Main/WebHome?] ERROR o.a.v.d.null                   - Exception in macro #handleDocumentTreeRequest called at xwiki:XWiki.ExportDocumentTree[line 3, column 1]

The above steps were done on a clean XWiki 17.10.4 (Oracle 19c/ Tomcat 11.0.18) instance.

Unfortunately, I couldn't find the exact steps to reproduce the issue, I also tried on another clean instance by backtracking the steps that could lead to the issue.