I'am no longer maintainig this project. And will archive it later.
So please look there https://github.com/Befzz/blender3d_import_psk_psa/issues/88

Blender3D Import psk psa addon

• This is an heavily edited version of original blender plugin by Darknet / Optimus_P-Fat / Active_Trash / Sinsoft / flufy3d: https://en.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/Unreal_psk_psa (old link)
• Import mesh and skeleton from .psk/.pskx
• Import animation from .psa
• Game files can be exported to psk/psa by UModel: https://github.com/gildor2/UModel

Changes from original release

• Blender 2.80+ support
• Fixed animation/skeleton import
• Psa: using .config generated by UModel
• Panel UI updated: All actions to NLA track, Mesh / skeleton or both import, Scale down, Vertex color

Download

• Releases -> _280.py file.

  Blender 2.7x ?

• Releases -> Source code (zip) -> (use _270.py version)

Install

• Edit -> Preferences... -> Add-ons -> Install...

  Blender 2.7x ?

• File -> User preferences -> Add-ons -> Install Add-on from File...

Install manually

Blender will look for .py add-ons there:
(you may need to create folders manually for your blender version!)

%APPDATA%\Blender Foundation\Blender\2.79\scripts\addons\  
%APPDATA%\Blender Foundation\Blender\ _version_ \scripts\addons\

Blender 2.7x ?

Disable original add-on:
Import Unreal Skeleton Mesh (.psk)/Animation Set (.psa)

Enable this one:
Import Unreal Skeleton Mesh (.psk)/Animation Set (.psa) (280)

Usage

Panel in 3DView (270)	Panel in 3DView (280)