This is a known Windows issue — Playwright expects a Linux-style $HOME variable that Windows doesn’t set by default (it uses %USERPROFILE% instead). Quick fix: open PowerShell and run [System.Environment]::SetEnvironmentVariable(‘HOME’, $env:USERPROFILE, ‘User’). Restart your IDE after that and browser automation should work. Someone else posted this as a tip in a separate thread and confirmed it resolves the issue. Would be nice if the Antigravity team just set this automatically on Windows installs.