ProMods

I'm running Promods & Reforma plus Montana expansion and some some smaller stuff. Loads but crashes when world map is accessed.

https://pastebin.com/embed_js/szqbC8D1

Thank you for your help

C:/Users/shkon/OneDrive/Documents/American Truck Simulator/mod/Reforma_2_1_8_141.scs
Triggers a big loss of cities.

Have you checked this loadorder tutorial?
https://forum.scssoft.com/viewtopic.php?f=201&t=250078

Not an expert but I think you just have it installed other way around.