Prerequisites:

• have a custom avatar for the existing admin account.

Steps to reproduce:

1. Logged with pre-admin account
2. Go to any Sandbox test page
3. Click More Actions → Export → HTML
4. Unzip the exported archive and open "index.html" page
5. Look at the user profile avatar on the page header

Actual result:

You won't see user avatar on local HTML version, instead of it you'll see invalid avatar in exported html file.png

If you check the HTML structure of the page, the image has a static path

<img src="/xwiki/bin/download/XWiki/Admin/neom-s0A8sa9oasY-unsplash.jpg?width=50&amp;height=50&amp;keepAspectRatio=true&amp;rev=1.1" alt="Administrator" title="Administrator">

Moreover, in unzipped folder, the image is located

test sandbox export html\attachment\xwiki\XWiki\Admin\neom-s0A8sa9oasY-unsplash.jpg

Expected result:

The avatar is visible after page export in HTML