With only this mod enabled, I can see that the terrain gen in 2.0.41 is broken now, if I revert back to 2.0.39 on the same save it generates good again
I probably won't have the time to look for a fix to make it work together with ERM Red Army (I assume that's another mod?). But if it's broken without it as well I might just have to find the time.
The root cause is the other mod, I’ve sent a message over there. But a workaround would be to redo the world size limits in settings final fixes, as they are setting map scaling to min 10 in settings updates when this mod is active