You need krita 4.0 or higher for correct working!
If your krita is not fresh enough open "files" and download pack v5.3, it will work fine on older versions.
A bit about pack:
1) I did it mostly for myself (sort of backup) this is why here my workspaces and weird tags
2) This pack is rather for painting, there is not line brush for example
3) If you looked for something similar to photoshop brushes you are in right place
4) You are free to change settings, names, icons, etc. I hope it’ll be useful :)