I've just noticed that all links in the help section What topics can I ask about here? point to programmers.stackexchange.com. Links to the main parts of the site do resolve to softwareengineering.stackexchange.com correctly, but it is not the case when it comes to Meta. After clicking any of the links pointing to meta.programmers.stackexchange.com, I see the page with the following message:
Couldn't find programmers.meta.stackexchange.com
I also noticed that the topics are still there - it's enough to change the programmers part in any of these links to softwareengineering and they can be read. E.g. this is not available:
but this is:
I think it's worth checking if other help sections have this bug too as the useful topics get dead if people can't get to them.