That’s the title, not an error message. It’s like Orwell’s 1984.
Users of that other OS are getting 1935 as an error message and it means that other OS broke itself again and must be re-installed. It’s fairly common that that other OS breaks itself although I’ve never seen it with GNU/Linux. I have re-installed GNU/Linux a couple of times when I broke the system doing risky brain-surgery.
When an OS breaks itself while users are doing perfectly normal things, you should not rely on that OS for your IT. Use Free/Libre Open Source Software. It works for you, not against you.