I do have the mods in the correct order as specified: Ironman on top, then the North mod.
There’s a red warning saying there is a resource conflict. It appears to work properly in-game, but Banished will crash any time I try to load a save, so rebooting the game is always necessary.
The crashing went away after a system reboot, so that part is resolved; the conflict warning in the mod list is still there though.
Nice you solved it. The red warning is normal and not a problem in this case. The game simply checks if mods contain a file with the same name and marks them red. Here the Ironman mod overwrites files of the main mod but of course intentionally.
Good to know, thanks.