Game Crash. Checked Everything
If you want to use Southern Region 7.2.x and/or The Great Steppe v1.0.3 with ProMods 2.30, until those maps are updated to be compatible with ProMods 2.30, you will need to use a temporary compatibility fix like this one: ProMods 2.30 Legacy Compatibility [1.31].
Also, you are not using a correct load order for RusMap with ProMods. See this: [Q&A] Load order of recommended compatible maps (1.31).
Also, you are not using a correct load order for RusMap with ProMods. See this: [Q&A] Load order of recommended compatible maps (1.31).