Nostalrius Begins - Quality wow vanilla realm (1.12)

So my problem is that when I log into the game/target a mob my game crash and following message appears:
This application has encountered a critical error:

ERROR #132 (0x85100084) Fatal Exception
Program: C:\World of Warcraft Classic\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:63A494AE

Is there something I can do to fix it?