Are you able to provide any more details on your actions, I am unable to reproduce this or your other error.
Steps taken:
- Install Alert Settings + Map Tag Generator
- Change some settings to different values in "per player" settings before creating a new map
- create a new map in local (no crash)
- create a new map in multiplayer (no crash)
- place buildings and attempt to use the Map Tag Generator (no crash)
- change settings via Mod Setting GUI (no crash)
- change settings via command (no crash)
Taking a look at the other mods I think that the error lies with them, I see you also reported on their end and they are labelled as "Fixed".
I'll mark this as resolved.