Try using the latest GZDoom version and the Doom Mod Loader
https://www.moddb.com/mods/doom-mod-loader/downloads/doom-mod-loader-v23
It works for me
By the way I have a little issue, why in the Icon of Sin boss fight it spams so many Aranea Imperatrix? It bugs me out because I tought the Arachnotron replacer was the Cyber-Mancubus, not the Spider Mastermind :((
Anyone knows if this is from the mod source code or my game is loading it wrong?