This is happening to me too.
I am running the Aslains_WoT_Modpack_Installer_v.1.0.1.1_19 file.
When I uninstall the mod pack, the game works fine.
When the mod pack is installed, the game crashes on loading and I get back to the desktop.
I think some mod/s within the pack is/are causing the crash. I ran the modpack with some minimal activated mods and the game started ok.