If inline images are missing from wiki pages hosted from OS X Server 5
If previews of attached graphic files are missing from some wiki pages, reset Quick Looks from the command line.
Quick Look thumbnails of some image attachments might not display on wiki pages built with Server 4. Instead, you might see just the filename for each image when viewing the page. After updating or migrating an existing Wiki from Server 4 to Server 5, you can use the command line to regenerate the inline previews.
Open Terminal.
Use this command:
sudo wikiadmin resetQuickLooks
Enter an administrator password, then press Return.
After using this command, both inline image previews and full size image Quick Look views should appear on your wiki pages.
Learn more
Learn more about Wiki server and Server 5 from Server Help.
Learn about additional capabilities of wikiadmin by using this Terminal command: wikiadmin -h