Robust client webview .NET error

[mudzbe]

Launching Tgstation playtest through SS14 launcher, Windows 11
It asks you to download/update .NET which I did but still the error persists, creating a duplicate of the error every few seconds, which prevents me from doing anything, sometimes the UI looks to have loaded ok. I've installed it twice, restarted my computer twice but the issue persists

[wixoaGit]

This is potentially from our playtest servers being out of date. I think they're still running the .NET 9 version of OpenDream.