WebView2 Runtime installation for Edge Browser is required for Voting clients if you are using Hyland IdP to login. Because the runtime performs data collection, it will be up to the customer to download and accept the EULA licensing terms and install it. The installer does not automatically perform the installation, but the installers do notify you if it is not installed.
Information regarding the download and installation of the WebView2 Runtime prerequisite can be found in the Installation Requirements module reference guide.