describe
This issue is caused by launch.exe.
launch.exe is not invoking EAC but build 1213 is dependent on EAC.
workaround (for powershell)
$REGPATH='HKLM:\SOFTWARE\Classes\VRChat\shell\open\command'
Set-ItemProperty -Path $REGPATH -Name '(default)' -Value (
(Get-ItemProperty -Path $REGPATH).'(default)'
).replace('launch.exe', 'start_protected_game.exe')
Note
I've seen this before, but now it's a release.
> During Open Beta, you must launch VRChat via special launch options in Steam. This will not be the case when the update goes to Live