Crash after intro

[gastropod11]

Hello everyone! I just recently bought this game and was eager to play it! I downloaded it all completely, installed it all completely, and launched the game. After the story introduction, the game all of the sudden crashed! I then opened it back up, and the same problem occurred. I also downloaded it from steam to see if it would fix it, but it did not. I got an error message in which I will include under the spoiler tab.

SpoilerShow

[string "AI.lua"]:0: attempt to perform arithmetic on a nil value
stack traceback:
[string "AI.lua"]: in function 'isBlocked'
[string "AI.lua"]: in function 'updateSenses'
[string "AI.lua"]: in function 'update'
[string "Monster.lua"]: in function 'update'
[string "Monster.lua"]: in function 'update'
[string "Map.lua"]: in function 'updateEntities'
[string "Dungeon.lua"]: in function 'updateLevels'
[string "GameMode.lua"]: in function 'update'
[string "Grimrock.lua"]: in function 'display'
[string "Grimrock.lua"]: in main chunk

OS Version 6.1

OEM ID: 0
Number of processors: 3
Page size: 4096
Processor type: 586

Total memory: 4095 MB
Free memory: 2175 MB

Display device 0:
Device name: \\.\DISPLAY1
Device string: ATI Radeon HD 5700 Series
State flags: 08000005

Display device 1:
Device name: \\.\DISPLAY2
Device string: ATI Radeon HD 5700 Series
State flags: 00000000

Display device 2:
Device name: \\.\DISPLAY3
Device string: ATI Radeon HD 5700 Series
State flags: 00000000

Display device 3:
Device name: \\.\DISPLAYV1
Device string: RDPDD Chained DD
State flags: 00000008

Display device 4:
Device name: \\.\DISPLAYV2
Device string: RDP Encoder Mirror Driver
State flags: 00200008

Display device 5:
Device name: \\.\DISPLAYV3
Device string: RDP Reflector Display Driver
State flags: 00200008

I hope you guys can help me! Thanks so much!