Kingdom rewards not working? (PC/mobile)

[Zelfore]

This guide should help you to check the base value in tributes each kingdom provides:

Kingdom Bonuses Guide (updated to 2.0)

This guide was out-of-date and has now been replaced by the equivalent Wiki page:

(Scrolling down that page will show you a nifty little flow chart provided by KAYA43V3R as well.)