On https://hroy.eu/timeline/sources/ you can see that everything was "last checked in the wee hours of Tuesday night, June 11th, 2014"
I don’t really know how to check what happens there.
Not sure what happened here. The site had a .ikiwiki/aggregatelock file, and something had it locked, as if aggregation was running. After I removed the file, aggregation is working again.
Wish I had thought to lsof it to see what had it open. There were no ikiwiki processes running for that account, so nothing should have..