Game Crashes When I Try to Change Settings

So I just attempted to start playing TBC and the first thing I do is attempt to fix settings. Whenever I change a setting, the game crashes.
Edit: This only happens when I try to change a video setting

ERROR #132 (0x85100084) Fatal Exception
Program: C:\TBC WoW\World of Warcraft - The Burning Crusade 2.4.3\Wow.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:004A5CC8

The instruction at "0x004A5CC8" referenced memory at "0x00000000".
The memory could not be "read".

If anyone could help me out, that would be fantastic.

Hello !

Similar problem, cannot log in the game since today. Getting this error in Medivh realm:

17:42:13.7460 Repairing DUNGEONS\TEXTURES\PILLAR\MM_OGRMND_STICKS_01.blp, 0-44876
17:42:13.7460 ERROR - No Repair URL: DUNGEONS\TEXTURES\PILLAR\MM_OGRMND_STICKS_01.blp, 0-44876

That happens only on my main character. I made an alt hero. Everything is OK with it.
Could you please help ?

Thank you in advance !
Best Regards !

Just wondering, how is your issue related to mine? It seems like our two issues are completely unrelated.