Unable to place all configured specials, some missions may fail to initialize. (x 2 through 11)

I’d like to know what exactly this error means. Encountered in version 0.H stable with mods: dda, package_bionic_professions, mindovermatter, magiclysm, MMA, extra_mut_scens, crazy_cataclysm, Tamable_Wildlife, no_fungal_growth, personal_portal_storms, no_npc_food, alt_map_key: removing magiclysm and mind over matter solves this error, although I haven’t tried removing only one or the other.

Error occurs at evac shelter computer when selecting contact us pressing any key. My system hangs for a while before producing this message 2 through 11 times, and successfully finds a route to the evac shelter when this error occurs less than 10 times, finds the evac shelter but without a route when it occurred 10 times, and failed to locate an evac shelter when it occured 11 times.

I first encountered the error in a game I was playing normally, but have reproduced the error using the evacuee scenario in a freshly generated world. I have tested this in the webassembly version in firefox running under windows and native Linux version in arch linux.

I’ve heard this is a mapgen problem, and the game will retry a few times to find missions before giving up. Since the error occurred twice in my world, and a route and the evac shelter are shown on the map, does this error mean all missions successfully loaded and the game simply retried twice?