Access Steam features in the Windows WebView2, macOS WKWebView, and Linux CEF exporters. Requires r407.2+ for Windows, r417+ for macOS, and r412+ for Linux.
Are you sure you're using r359+? The latest stable release r358 is not currently supported, you have to use a beta release at the moment.
Thank you very much for the quick answer.
It was my fault for not reading the notes.... thank you