Help, I bought the game and I can't sign in due to the error: PlatformNotSupported. Anyone got any ideas on how to fix it?
The itch.io PC version of Among Us is no longer supported. If you're willing to use Steam (and safe to do so, which some people haven't been since they turned it into a health risk in late 2019), the download page on here also has an option to redeem a Steam key. Otherwise you'll probably want to refund and purchase somewhere else.
The devs have said they were looking into supporting itch.io again in future, but haven't included any timeline for doing so on their roadmap, or promised with any confidence that they will do so. Unfortunately, this is an issue the devs have confirmed they know about but aren't even promising they will ever fix, let alone giving an expectation for when it'll happen.