@amonmen11 The answer is Slovenia was one of the countries limited when the war between Russia and Ukraine was started and there were big sanctions in the area, from where they were worried about Russia being funded by crypto and were trying to limit any money that way. You can see the notice of that at Important: Uphold no longer supporting countries in Russia, Ukraine, Belarus, and Balkans region
You’ll notice most, if not all, of those countries still don’t have support enabled. The Rewards team has stated they are ready to enable them again but are in talks with Uphold on how to do it. Basically, it’s waiting for Uphold to reenable the API again.