404 is shown when preview draft Web Content displayed in display page template

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.2.10 DXP FP9, 7.2.X, 7.3.3 CE GA4, 7.3.10 DXP GA1, Master
• Component/s: Page Templates > Display Page Templates
• Labels:
  • QA-AUTOMATION
  • ee-ts
  • liferay-fixpack-dxp-9-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Last Working Version:
  7.3.2 CE GA3
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/1025
• QA Test Name:
  • LocalFile.DisplayPagesUseCase#EditWhenViewingInDisplayPageAsUser
  • LocalFile.DisplayPagesUseCase#ViewlanguageSelectorRedirect
  • LocalFile.DisplayPagesWithWebContent#PreviewDraftWebContent
• QA Test Score: 14

Step to reproduce:

1. Add a display page template with Web Content Article type and Basic Web Content subtype
2. Add a Display Page Content fragment to display page template
3. Publish
4. Click ellipsis button of display page template
5. Mark as Default
6. Add a Web Content Article based on Basic Web Content
7. Type title and content
8. Click Save as Draft
9. Expand Display Page Template
10. Click eye icon button

Expected Results:
The content of WC is shown in preview popup.

Actual Results:
The 404 not found is shown in preview popup. And the following error is thrown in browser console.

• http://localhost:8080/web/guest/-/wc2?p_l_mode=preview&_undefined_bodyCssClass=dialog-iframe-popup dialog-with-footer

Reproduced on:
Tomcat 9.0.33 + MySQL 5.7. Portal master GIT ID: dfcc23ae99e0e56a9f06b27a38863d2df18a1bd1.

Cannot be reproduced on:
Tomcat 9.0.33 + MySQL 5.7. Portal 7.3.2-GA3 GIT ID: 0515646c8f638f202d107469cc147172fc7685de.