New to WoW, making my life more difficult than it should!

First of all, I want to say hi, although I know this isn't the thread. Kinda rude to just barge in asking.
So: I decided, after years of refusal, to try WoW, and I am a bit masochistic and such, so instead of just running on my corei7, I decided "wait a minute, Lich King runs on PowerPC Macs!" So I downloaded the client for Mac, and yes, my old G5 Quad runs it. Until I reach the server.
I can boot the the game, I can log in, I can select a server. When I log into the server, it goes into a screen that states "retreiving charachter list", but it lasts just a fraction of a second, and it crashes the game.
I've been lookng around, and tried deleting the patch-w.mpq files, but there are nowhere to be found, so that can't be the issue.
This is the error log (sorry for no proper formatting):
WoWBuild: 22340
Code Type: PPC
OS Version: Mac OS X 10.5.8 (9L31a)
Executable UUID: 251DB9AB-7F76-3907-4EFB-9A9182F50F5B
Settings:
SET readTOS "1"
SET readEULA "1"
SET readTerminationWithoutNotice "-1"
SET readScanning "-1"
SET readContest "-1"
SET locale "enUS"
SET movie "0"
SET showToolsUI "1"
SET realmlist "logon.warmane.com"
SET coresDetected "2"
SET hwDetect "0"
SET gxRefresh "60"
SET gxMultisampleQuality "0.000000"
SET videoOptionsVersion "3"
SET textureFilteringMode "0"
SET Sound_OutputDriverName "System Default"
SET farclip "177"
SET installType "Retail"
SET Gamma "1.000000"
SET Sound_MusicVolume "0.40000000596046"
SET Sound_AmbienceVolume "0.60000002384186"
SET accounttype "LK"
SET portal "us"
SET mouseSpeed "1"
SET gameTip "27"
SET checkAddonVersion "0"
SET realmlist.spermik.tk ""
SET uiScale "0.87000000476837"
SET MaxLights "1"
SET gxWindow "1"
SET particleDensity "0.10000000149012"
SET baseMip "1"
SET environmentDetail "0.5"
SET weatherDensity "0"
SET groundEffectDist "70"
SET useUiScale "1"
SET Sound_EnableMusic "0"
SET preferredFullscreenMode "2"
SET Sound_MasterVolume "0.10000000149012"
SET showGameTips "0"
SET Sound_SFXVolume "0.40000000596046"
SET MovieRecordingGUI "0"
SET iTunesRemoteFeedback "0"
SET MovieRecordingWidth "800"
SET Sound_EnableSFX "0"
SET Sound_EnableAmbience "0"
SET realmName "Lordaeron"

----------------------------------------
GxInfo
----------------------------------------
GxApi: OpenGL
Vendor: NVIDIA Corporation
Renderer: NVIDIA Quadro FX 4500 OpenGL Engine
Version: 2.0 NVIDIA-1.5.48


================================================== =======
Assertion Failed!

App: /Volumes/Black-Widow/Mac things/Wrath of the Lich King 3.3.5a (Mac)/World of Warcraft.app
File: (unknown)
Line: 0
Error Code: 0x85100086
Time: 2019-04-22 20.16.36 CEST

Assertion: Improper header received: [ CE FA ED FE 07 00 00 00 03 00 00 00 08 00 00 00 0A 00 00 00 48 07 00 00 85 20 01 00 01 00 00 00 ]

---------------------------------------------------------
Thread 0 0x0000020b (Current)
0 0x00015fbc start + 78524
1 0x00016904 start + 80900
2 0x0081c718 _AssertAndCrash + 1605084
3 0x00238f88 start + 2318984
4 0x002390fc start + 2319356
5 0x498ecbec
6 0x498ec6c4
7 0x002396f8 start + 2320888
8 0x00285654 start + 2632020
9 0x00286614 start + 2636052
10 0x006a51e0 _AssertAndCrash + 67748
11 0x008d33d8 _AssertAndCrash + 2353820
12 0x006c982c _AssertAndCrash + 216816
13 0x006cd0b8 _AssertAndCrash + 231292
14 0x006cd3c8 _AssertAndCrash + 232076
15 0x006cd47c _AssertAndCrash + 232256
16 0x008d9408 _AssertAndCrash + 2378444
17 0x008e8258 _AssertAndCrash + 2439452
18 0x9421bc4c DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 1488
19 0x9421ade4 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 468
20 0x9421ac00 _SendEventToEventTargetWithOptions + 56
21 0x9424ab8c ToolboxEventDispatcherHandler(OpaqueEventHandlerCa llRef*, OpaqueEventRef*, void*) + 312
22 0x9421c0a0 DispatchEventToHandlers(EventTargetRec*, OpaqueEventRef*, HandlerCallRec*) + 2596
23 0x9421ade4 SendEventToEventTargetInternal(OpaqueEventRef*, OpaqueEventTargetRef*, HandlerCallRec*) + 468
24 0x94237d08 _SendEventToEventTarget + 56
25 0x942a64ac _ToolboxEventDispatcher + 88
26 0x942a29e8 _RunApplicationEventLoop + 168
27 0x008e86dc _AssertAndCrash + 2440608
28 0x00003020 start + 800
29 0x00002d30 start + 48



Thread 1 0x00002103
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x00f995a0 ___ape_agent + 368
3 0x96603f74 __pthread_start + 320



Thread 2 0x00003b07
0 0x965c21f8 _mach_wait_until + 8
1 0x9664d590 _nanosleep + 328
2 0x9664d438 _usleep + 72
3 0x00052c94 start + 327572
4 0x00045f84 start + 275076
5 0x96603f74 __pthread_start + 320



Thread 3 0x00004603
0 0x965c8a8c ___semwait_signal + 12
1 0x9660531c __pthread_cond_wait + 1584
2 0x95147b6c _glvmDoWork + 124
3 0x96603f74 __pthread_start + 320



Thread 4 0x00006003
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x906b60d0 _glcDebugListener + 240
3 0x96603f74 __pthread_start + 320



Thread 5 0x0000680f
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x9664ae4c _mach_msg_server + 652
3 0x008db96c _AssertAndCrash + 2388016
4 0x96603f74 __pthread_start + 320



Thread 6 0x00006c03
0 0x965c21f8 _mach_wait_until + 8
1 0x9664d590 _nanosleep + 328
2 0x9664d438 _usleep + 72
3 0x007be500 _AssertAndCrash + 1219524
4 0x0002ec98 start + 180120
5 0x0002ee0c start + 180492
6 0x975f1d88 ___NSThread__main__ + 1008
7 0x96603f74 __pthread_start + 320



Thread 7 0x00007003
0 0x965c20d8 _semaphore_wait_signal_trap + 8
1 0x96605228 __pthread_cond_wait + 1340
2 0x00017744 start + 84548
3 0x0089b574 _AssertAndCrash + 2124856
4 0x0002ec98 start + 180120
5 0x0002ee0c start + 180492
6 0x975f1d88 ___NSThread__main__ + 1008
7 0x96603f74 __pthread_start + 320



Thread 8 0x0000de03
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x9268f398 _CFRunLoopRunSpecific + 1816
3 0x933bffac HALRunLoop::OwnThread(void*) + 216
4 0x933bfde8 CAPThread::Entry(CAPThread*) + 108
5 0x96603f74 __pthread_start + 320



Thread 9 0x0000e303
0 0x965c20f8 _semaphore_timedwait_signal_trap + 8
1 0x96605218 __pthread_cond_wait + 1324
2 0x933d1784 CAGuard::WaitFor(unsigned long long) + 212
3 0x933d19f4 HP_IOThread::WorkLoop() + 492
4 0x933d17f4 HP_IOThread::ThreadEntry(HP_IOThread*) + 16
5 0x933bfde8 CAPThread::Entry(CAPThread*) + 108
6 0x96603f74 __pthread_start + 320



Thread 10 0x0000e503
0 0x965c21f8 _mach_wait_until + 8
1 0x97123f08 _MPDelayUntil + 36
2 0x0099c4e8 _AssertAndCrash + 3177388
3 0x009b984c _AssertAndCrash + 3297040
4 0x96603f74 __pthread_start + 320



Thread 11 0x0000e603
0 0x965c21f8 _mach_wait_until + 8
1 0x97123f08 _MPDelayUntil + 36
2 0x0099c4e8 _AssertAndCrash + 3177388
3 0x009b984c _AssertAndCrash + 3297040
4 0x96603f74 __pthread_start + 320



Thread 12 0x0000e703
0 0x965c20d8 _semaphore_wait_signal_trap + 8
1 0x96605228 __pthread_cond_wait + 1340
2 0x00017744 start + 84548
3 0x000ad0a8 start + 697256
4 0x0002ec98 start + 180120
5 0x0002ee0c start + 180492
6 0x975f1d88 ___NSThread__main__ + 1008
7 0x96603f74 __pthread_start + 320



Thread 13 0x0000eb03
0 0x965c20d8 _semaphore_wait_signal_trap + 8
1 0x965c9338 _pthread_mutex_lock + 652
2 0x0028643c start + 2635580
3 0x002860a4 start + 2634660
4 0x006ab094 _AssertAndCrash + 91992
5 0x006ab440 _AssertAndCrash + 92932
6 0x006abc28 _AssertAndCrash + 94956
7 0x006abd0c _AssertAndCrash + 95184
8 0x006abd78 _AssertAndCrash + 95292
9 0x0002ec98 start + 180120
10 0x0002ee0c start + 180492
11 0x975f1d88 ___NSThread__main__ + 1008
12 0x96603f74 __pthread_start + 320



Thread 14 0x0000ec03
0 0x9660af38 ___select_nocancel + 12
1 0x96660b40 _select + 72
2 0x006ad004 _AssertAndCrash + 100040
3 0x006ac0a0 _AssertAndCrash + 96100
4 0x0002ec98 start + 180120
5 0x0002ee0c start + 180492
6 0x975f1d88 ___NSThread__main__ + 1008
7 0x96603f74 __pthread_start + 320



Thread 15 0x0000f307
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x9268f398 _CFRunLoopRunSpecific + 1816
3 0x97648d54 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 284
4 0x975f1d88 ___NSThread__main__ + 1008
5 0x96603f74 __pthread_start + 320



Thread 16 0x0000fd03
0 0x965c2078 _mach_msg_trap + 8
1 0x965c8fa0 _mach_msg + 60
2 0x9268f398 _CFRunLoopRunSpecific + 1816
3 0x97a6e394 CFURLCacheWorkerThread(void*) + 292
4 0x96603f74 __pthread_start + 320



Thread 17 0x0001090b
0 0x96625c14 ___select + 12
1 0x9269a80c ___CFSocketManager + 768
2 0x96603f74 __pthread_start + 320



Thread 18 0x00006b07
0 0x965c8a8c ___semwait_signal + 12
1 0x9660531c __pthread_cond_wait + 1584
2 0x22eb6764 _gleCmdProcessor + 148
3 0x96603f74 __pthread_start + 320



Thread 19 0x0000670f
0 0x965c20f8 _semaphore_timedwait_signal_trap + 8
1 0x96605218 __pthread_cond_wait + 1324
2 0x00017884 start + 84868
3 0x0069e578 _AssertAndCrash + 39996
4 0x0002ec98 start + 180120
5 0x0002ee0c start + 180492
6 0x975f1d88 ___NSThread__main__ + 1008
7 0x96603f74 __pthread_start + 320




---------------------------------------------------------
Modules
---------------------------------------------------------
DBG-MODULE<0x00001000 0x00bd7000 "World of Warcraft" {251DB9AB-7F76-3907-4EFB-9A9182F50F5B}>
DBG-MODULE<0x978f0000 0x97901000 "AGL" {E751A9E4-91C3-A9EF-82C6-405466106726}>
DBG-MODULE<0x906ab000 0x906ba000 "OpenGL" {54BAE289-E544-387C-E799-7A4A05E70AA9}>
DBG-MODULE<0x97837000 0x97865000 "libGL.dylib" {}>
DBG-MODULE<0x96a14000 0x96a6b000 "libGLU.dylib" {3418CE7C-A086-3162-847F-553C15D08674}>
DBG-MODULE<0x93bd3000 0x93c23000 "libGLImage.dylib" {2E1F2A26-2506-4149-D209-EC19E52D0384}>
DBG-MODULE<0x95122000 0x95551000 "libGLProgrammability.dylib" {5D52750E-C9E4-38B2-5D3A-4DB51361FA2B}>
DBG-MODULE<0x22ddd000 0x22f56000 "GLEngine" {AD5267F5-0A41-8511-DAF9-F5F237D7F852}>
DBG-MODULE<0x22f87000 0x23111000 "GeForceFXGLDriverPPC" {FB5DF1B8-4CE3-5800-8D10-BB87F62D7B9B}>
DBG-MODULE<0x0166d000 0x0168a000 "GLRendererFloat" {020C309B-1F0A-3109-FBF8-F76764E9AD69}>
DBG-MODULE<0x4258f000 0x42594000 "AudioIPCPlugIn" {AC58EBBD-8E11-79FF-891B-7A60B2BA33CC}>
DBG-MODULE<0x41f76000 0x41f78000 "AOAHALPlugin" {0D6BE2C8-3D2F-5820-60BA-48293D283CDD}>
================================================== =======


I hope you guys can point me to the obvious mistake I may have made, and I can get online with this old beast.
Please, please: Don't just tell me "just play on Windows". I know that, I have a nice PC and I can go there no prob. That is not a solution to the problem, I do want to run it on this system, weird as it may be. So please don't answer with "just run it on another system" because that is not a solution to my problem at all.
Thanks in advance to anyone who tries to help me out, and sorry for the long post!

EDIT 1: Logging into other servers works fine, it's just Warmane. Weird since I downloaded the client from here? I hope I can figure it out.

Same system, same issue, same error: Assertion: Improper header received: [ CE FA ED FE 07 00 00 00 03 00 00 00 08 00 00 00 0A 00 00 00 48 07 00 00 85 20 01 00 01 00 00 00 ]