Hi all,
I experienced "Preview Unavailable" issue for some of the pages and found the fix in setting/increasing PreviewTimeout. However I set it to 40000 instead of 20000, and noticed, that it's now even worse than was. Almost every page has no preview now, and those page previews which eventually loaded took way too much time to load preview than before. Is it because I set PreviewTimeout to 40000 instead of recommended 20000?
Also we haven't got this "key" in our Web.config before at all.
<add key="episerver:ui:PreviewTimeout" value="40000" />