Basically we are modding tool users, not the developers, thus we cannot easily solve the innate issue. We can just share our experience.
(thats why I directly asked SK forum for the technical support, a year ago)
How about sharing your current status with screenshot?
Maybe we can find some clues in your status, including SKIF status, My Mods\SpecialK structure, etc.
Also maybe; something could be in their wiki,
The Complete Guide to SK (and they also have their own discord server)
JFYI, in case you are using 0.11.0.50 or 21.04.04, here's some possible clue from my machine
- It is working well with latest 20.2 hearthstone
- Still, I need to attach SK after hearthstone starts up. The screen goes black if I run hearthstone with SKIF service started. For stability, I suggest to attach after the main menu pops up.
- Whitelist stores in c:\users\<username>\Documents\My Mods\SpecialK\Global\whitelist.ini