after several attemps since yesterday, I finally reinstalled both the game and your mod but it is still hanging on the last screen "finishing installation". I tried to reduce the number of mods but no change.
Here is the installation complist log, french version.
If I kill the .tmp*32 process and I start the game, it seems that mods are OK (I did not try a battle) but I got this "modpack by aslain is outdated (v3.1.1)" which makes me believe installation is not complete (even after a fresh install of both game and modpack)
Maybe you can try to reproduce ?
_Aslains_Installer_CompList.log