Xbox PC Solved - Can't Load Tsw4 With Dlc Via Xbox/ms Store App On Pc.

Hey all, really needing some help and hopefully someone here has ran into the same issue and solved it before!

I've been trying to load up TSW4 for days now through the Xbox app on PC and the Store app but with no luck. The game opens to the load screen and freezes up with the new loading bar at around 10%. Everytime I get this error:

The UE4-TS2Prototype Game has
crashed and will close
LowLevelFatalError [File:Unknown] [Line: 5334]
Index offset for pak file 'C:\XboxGames\East Coast Mainline-
Peterborough to Doncaster Content\/TS2Prototype/Content/
DLC/TS2Prototype-WinGDK-East Coast Mainline.pak' is invalid
(-1 is bigger than file size 7884355246)

No matter if I remove that DLC, the next one in line will throw out the same error (just with different file sizes), and the next.

Steps I've tried:
Repair and verify
Deleting the .pak files (This just starts giving me an infinite load)
Reinstall(s)
Clean windows 11 install
Install on different drives
Xbox app repair(s) and gaming services
All drivers/Bios updates
Installing without Windows security features active
SFC and DISM commands

I'm still in contact with support but hoping someone here might also have some insight, this is the only game I've had problems with. My PC specs are far above required.

 

SOLVED!

For anyone else who runs into this issue, try going to the store page for the DLC on the Microsoft/Xbox website and pressing 'Install' on there, it will open the app to install.

For some reason this worked, and I can now play all my DLC.