Blizzard released a patch for PC to fix an issue that was preventing players from completing purchases from the Diablo 4 in-game Cash Shop. Diablo 4 Premium Currency Guide
JUNE 5, 2023 — Diablo IV Patch Notes 1.0.2f Build 42192 (PC) Fixed an issue that prevented players from successfully progressing through the checkout flow for purchases in the Shop. Read more on wowhead.com