World of Warcraft - WotLK "OpenVR: failed to locate module & DXVK Error"

Seems to be a similar problem like this one here:

Vulkan seems to need DRI3, which is not enabled by default. If you are really sure, that your Intel Chipset supports vulkan, then add this

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "DRI"    "3"
EndSection

Source

to your /etc/X11/xorg.conf.d/20-intel.conf. If not there, create one and reboot. Check vulkaninfo again.

Alos keep sure that you have installed vulkan-intel and vulkan-icd-loader.