WebView2 Runtime installation for Edge Browser is required to view documents in Agenda by default. This is an option to add the webBrowserRenderMode option to the config file and set it to use "ie" instead of "edge." 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.