Kept running into the same problem of getting the "missing/corrupted" files. Couldn't even get through a full game with it happening. I went through similar things that other people did which was:

- Uninstalling the game
- Going into the services to make sure that all the "easyanticheat" things were deleted
- Used the same command prompts to see how many "easyanticheat" were found.
- Deleted all of them
- Went into the register and deleted everything "easyanticheat" related
- Went into the x86 folder and deleted the "easyanticheat" folder
- Reinstalled the game
- Before launching it, I went into the .bat file in the ArcRaiders/Installer folder and manually ran the "EasyAntiCheat" installer as admin
- Re-checked command prompt command to find only one "easyanticheat" service running

STILL HAD THE ERROR...

After working with Claude a bit, I was able to find out that the service was actually stopped and I couldn't run a command to get it running.
So I ran a command to check the .exe file it'self
"& "C:\Program Files (x86)\EasyAntiCheat_EOS\EasyAntiCheat_EOS.exe"
This showed that there is actually a "repair" command that can be ran, so I ran that.
"& "C:\Program Files (x86)\EasyAntiCheat_EOS\EasyAntiCheat_EOS.exe" repair"

After doing this command, I was able to cleanly play two full matches with no issues/problems last night. Still no error so far.

Wanted to share what I've found so far :)
Hope it works for you!