Play Store presets shows "no results"

When i want to load preset i have downloaded from the Play Store it says "no results",

Hi! This usually happens when another app is interfering with content providers, do you have Greenify or Purify installed? If yes please either disable them or ensure that the preset packages are whitelisted from the apps (not the Kustom app, just the preset packs you installed).

I just bought the pro version and I'm experiencing the same problem. It shows no results on my installed widget. I have no idea how to whitelist them since I don't have purify or greenify installed