The Edge Chromium browser has experimental ClickOnce support which must be enabled for AKC. The browser will not detect support for ClickOnce, so you will still need to download AKC manually.
To enable ClickOnce in Edge: Type edge://flags in the browser, search for ClickOnce support, set to enabled and restart the browser.
To download AKC manually: Go to the Dominion KX IV–101 URL, for example https://(KX-IP-Hostname)/akc then select "Please click here" on the message showing that ClickOnce support has not been detected.
