This error appears if the software is installed on an outdated operating system (e.g. Windows 7) that lacks the new web browser component, based on Microsoft Edge and no longer on Internet Explorer, which is present on new PCs with an updated Windows operating system.
To resolve this error, simply download the Microsoft Edge WebView2 component from the Microsoft Edge WebView2 | Microsoft Edge Developer page and click on Download at the bottom of the ‘Evergreen Bootstrapper’ section. The component’s exe will start downloading, once started it will auto-install the component. When GeoStru PS Advanced is started, the error message will no longer appear.