Crash without any reason at all

Hello! I started playing WoW recently and i really enjoy the game. I am playing for like a month and I didn`t experience any lag at all. From yesterday as i log in to my account and enter the world a crash occurs and closes my game. It says: "Not enough storage is available to process this command. " I have many heavier games on my PC and i don`t experience any lag. It`s just my favorite game at the moment, World Of Warcraft. Here is something more I can include from the error details:
Hardware/Driver Information:
Processor: 0x0
Page Size: 4096
Min App Address: 0x10000
Max App Address: 0x7ffeffff
Processor Mask: 0x3
Number of Processors: 2
Processor Type: 586
Allocation Granularity: 65536
Processor Level: 6
Processor Revision: 5898
Os Version: 6.1
Os Service Pack: 1.0

Percent memory used: 90
Total physical memory: 3756515328
Free Memory: 340549632
Page file: 7511236608
Total virtual memory: 2147352576

I watched tutorials how to fix the problem, but there was no video with this problem at all. If you can help me i would be really thankful!!!

If that's worlk client, the problem is caused by WoD/Legion character models that the new client provided by Warmane includes. You can use this to allow WoW.exe to use more memory.