When start new world, there is no enemy on the map?

It's likely caused by RSO settings. Please refer to mod-compatiblity doc for details.
https://github.com/heyqule/enemy_race_manager/blob/main/Mod-Compatibility.md

Warning: Not recommend to apply to an existing save with Factorio World

As map-gen-scale minimum value raise to 10, this will skew the map generation of existing map. The mod also force Factorio World to only generated on planet earth. It can no longer generate on planet Nauvis.