I've been working with Ubisoft for the past 5 days (since 10/10/22) to try and fix this problem. Whenever I try to launch my game it tells me failed to authenticate this purchase. I've tried verifying the game files on steam, I've uninstalled and reinstalled, running the app as an administrator, yet nothing works. I've had my Steam linked to a different Ubisoft account but since then I've unlinked and relinked to this account. At this point I'm going to refund the game and never play it.
Please help,
Austin