Thank you for your answer.
So multiple users are currently mining different chains?
This is too hardcore for me I'll just pick another coin for her
yeah, probably. Maybe the coin was 51%-attacked in the past and the devs didn't clear the situation afterwards and that is the reason for it to be considered a 'dead' coin. So it's not useable. Why not mine something that is actually working and has some value? Should be more fun too since you get some btc out.
Thank you for explaining that,
That is probably what I'll do, maybe doge/corgi because she loves dogs