Nitzer Ebb was one of the first industrial bands I got into when a good friend gave me a bunch of burnt CDs. Sad to hear but I guess he's had health problems for a couple years now.
I remember the last time I saw him, and IIRC he was touring with his kid. Not playing the same venue but they were just traveling together to save on costs.
https://www.stereogum.com/2311466/nitzer-ebb-frontman-douglas-mccarthy-dead-at-58/news/
https://en.wikipedia.org/wiki/Douglas_McCarthy