| Steps to reproduce:
- Enable multilingual and add German to the supported languages.
- Switch to German
- Edit the sandbox main page "Sandkasten"
- Go to the history tab
- Click on the "2.1" entry
- Scroll to where the logo image should be displayed
Expected result: The image is displayed. Actual result: An error "Cannot invoke "com.xpn.xwiki.doc.XWikiDocument.getAttachment(String)" because "rdoc" is null" is displayed with stack trace
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