Unfortunately, the key verifier is currently failing to write data as designed, which means it only allows you to play the game once.
Please don't worry—we already have a solution. A hotfix will be uploaded this Monday to completely resolve this problem. Right after the hotfix goes live, I'll update the download page with brand-new keys so you can jump back in without any issues.
I sincerely apologize for the inconvenience and the interruption to your playtime. Thank you so much for participating in Early Access. Your support, feedback, and patience are exactly what help make this game the best version of itself for you. <3