Dave, I put in a ticket to Yuku about the search problem on the old board. Just received this response.
Yuku via freshdesk.com
The board is no longer used. There have been 0 posts in at least 6 months. Search is triggered by posting, on an abandoned forum, if no posts are made, the search will stop working eventually.
You’ll need to start a new topic as well as a new reply to trigger the indexer.
I explained to them that this was our archive. I’m sure they fixed it before without having to go this route but if you enable posting, make a post and reply to yourself that should hopefully do the trick. If not I’ll contact them again.