tldr; uninstall the BASE GAME ONLY, then reinstall ONLY the base game (u can leave the content packs installed) and do not click to reinstall campaign mp or zombies or dead ops they will reinstall anyway but if you click on them to reinstall then the download will turn into a smaller 75 gb instead of the 115gb and im pretty sure you need it to be that 115 gb download for it to work
25 апр 2021