Since I have installed Cartograph on my dedicated server, it sometimes crashed when players join. Several other mods are installed as well, so I'm unable to say if there's some back interaction between them.
Here are 3 different log files with the same fatal error right before crashing:
FactoryGame.log
FactoryGame-backup-2025.08.12-14.26.45.log
FactoryGame-backup-2025.08.12-16.36.10.log