BEcaUSe THatS HoW it WORKs.
I am using the steam version, so I already downloaded the update the other day, and I am using the CE 03.04.2020 version, which is the Halo: Combat Evolved version and still getting this problem. I have replaced the mcclauncher.exe and I am running the trainer as admin. I also verified all of my Halo files through steam to make sure there was not an update I was missing.
Update: Apparently the new update has to be installed from within the game itself, which I have never seen before. I figured that when I downloaded the almost 10GB update two days ago that would be it, but of course they had to make it complicated. Will update once the new 6.5GB update is finished.
Update 2: That resolved the issue, everything working fine now
[Edited by priced4evil, 3/4/2020 3:55:28 PM]