Crashing upon joining servers

[GraveEmbrace]

Game seems to load fine but crashes instantly after getting into the server. Makes a memory dump file every time that ends in "accessviolation.mdmp" evaluating reads:

*** WARNING: Unable to verify checksum for materialsystem.dll

KEY_VALUES_STRING: 1

Key  : AV.Fault
Value: Write

Key  : Analysis.CPU.mSec
Value: 437

Key  : Analysis.Elapsed.mSec
Value: 1624

Key  : Analysis.IO.Other.Mb
Value: 0

Key  : Analysis.IO.Read.Mb
Value: 1

Key  : Analysis.IO.Write.Mb
Value: 0

Key  : Analysis.Init.CPU.mSec
Value: 578

Key  : Analysis.Init.Elapsed.mSec
Value: 21653

Key  : Analysis.Memory.CommitPeak.Mb
Value: 98

Key  : Analysis.Version.DbgEng
Value: 10.0.27725.1000

Key  : Analysis.Version.Description
Value: 10.2408.27.01 x86fre

Key  : Analysis.Version.Ext
Value: 1.2408.27.1

Key  : Failure.Bucket
Value: INVALID_POINTER_WRITE_c0000005_datacache.dll!Unknown

Key  : Failure.Hash
Value: {ef054455-b51d-c623-d2ff-783980c6a6d0}

Key  : Timeline.Process.Start.DeltaSec
Value: 26

FILE_IN_CAB: tacint_mapkit_20241110_164757_1_x25CCF258_accessviolation.mdmp

NTGLOBALFLAG: 0

APPLICATION_VERIFIER_FLAGS: 0

CONTEXT: (.ecxr)
eax=ffff6564 ebx=6f676c80 ecx=00d9d000 edx=00000001 esi=6f676c80 edi=03060000
eip=6f612a32 esp=25ccf88c ebp=25ccf894 iopl=0 nv up ei ng nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010282
datacache+0x2a32:
6f612a32 ff00 inc dword ptr [eax] ds:002b:ffff6564=????????
Resetting default scope

EXCEPTION_RECORD: (.exr -1)
ExceptionAddress: 6f612a32 (datacache+0x00002a32)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000001
Parameter[1]: ffff6564
Attempt to write to address ffff6564

PROCESS_NAME: tacint_mapkit.exe

WRITE_ADDRESS: ffff6564

ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.

EXCEPTION_CODE_STR: c0000005

EXCEPTION_PARAMETER1: 00000001

EXCEPTION_PARAMETER2: ffff6564

STACK_TEXT:
WARNING: Stack unwind information not available. Following frames may be wrong.
25ccf894 6f6173eb 00000000 6f61ee83 52539d68 datacache+0x2a32
25ccf8bc 52465b2b 02f64ab0 02f64ac4 00000000 datacache+0x73eb
25ccf8d0 52473af0 5253c29c 5245f9b8 6f6f9317 materialsystem+0x35b2b
25ccf914 5310558e 25ccf964 25ccf958 530ffb7a materialsystem+0x43af0
25ccf920 530ffb7a 1a6f5d40 53105380 530ff945 tier0!CThread::ThreadProcRunWithMinidumpHandler+0xe
25ccf958 530ffda2 25ccf964 00000003 53105580 tier0!RemoveMemoryInfoCallback+0x3da
25ccf97c 53105482 53105580 1a6f5d40 00000000 tier0!CatchAndWriteMiniDumpForVoidPtrFn+0x52
25ccf9b4 764dfcc9 1a6f5d40 764dfcb0 25ccfa20 tier0!CThread::ThreadProc+0x102
25ccf9c4 7791809e 1a6f5d40 b3a25f4d 00000000 kernel32!BaseThreadInitThunk+0x19
25ccfa20 7791806e ffffffff 7793912d 00000000 ntdll!__RtlUserThreadStart+0x2f
25ccfa30 00000000 53105380 1a6f5d40 00000000 ntdll!_RtlUserThreadStart+0x1b

SYMBOL_NAME: datacache+2a32

MODULE_NAME: datacache

IMAGE_NAME: datacache.dll

STACK_COMMAND: ~153s; .ecxr ; kb

FAILURE_BUCKET_ID: INVALID_POINTER_WRITE_c0000005_datacache.dll!Unknown

OSPLATFORM_TYPE: x86

OSNAME: Windows 8.1

FAILURE_ID_HASH: {ef054455-b51d-c623-d2ff-783980c6a6d0}

Followup: MachineOwner