We are upgrading some of the core infrastructure behind PlayStrategy, namely the version of scala that runs the server. This isn't a simple upgrade, and a lot of code has had to be tweaked to make it compatible. We've got this new version of PlayStrategy running over on our test site at: playstrategy.dev which we've opened to the public.
Our initial testing has been positive, and we are planning to deploy the upgrade sometime next week. If anybody would like to help us with testing please feel free to go onto playstrategy.dev and try out many of the functions and features. If you notice any issues please report them in the forum on the site: playstrategy.dev/forum/playstrategy-feedback/scala3-testing-feedback