Saw update 22 minutes after you posted. Got premature exuberance and downloaded and installed on server and client
Minecraft 1.12.2 local server and clients on a private LAN
Forge-1.12.2-14.23.5.2844
ImmersiveEngineering-0.12-90
Other mods
-Crafttweaker2-1.12-4.1.19
-davincisvessels-1.12-6.340-full
-Dynmap-3.0-beta-3-forge-1.12.2
-MCJoypad-Mod-1.12.2
-movingworld-1.12-6.342-full
-railcraft-12.0.0

Server loaded mod, but as soon as client joined, server crashed. Had to revert to -89 to fix problem

crash-2019-09-02_17.55.41-server.txt

Hope this helps.