I have stumbled across a peculiar problem: After many years of using WordPress, I have lost a post. The entry still exists, and while logged in, I can edit it - but neither the preview nor the viewing of the article work. Inevitably, I end up on 404.
This is the entry's address, unchanged since its publishing:
The lost entry on Nonformality
I have tried changing the webaddress of the article, and reverting to the standard permaling structure, both to no avail. The post is not private.
Here is an archived version of the article on the wayback machine:
Does someone have an idea what could be going on?