https://bugs.winehq.org/show_bug.cgi?id=51606
--- Comment #3 from Jeff Zaroyko jeffz@jeffz.name --- After updating the user agent string to ie11: "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko" with a hack, it progresses past the "Update Required" to a new one:
Browser not supported To use the current website, please update your browser to the latest version or try a different browser.
That appears to be after loading this page: https://auth.services.adobe.com/en_US/index.html which contains that message in a hidden element and a bit of javascript to decide whether to display the element or not:
!function(){var e=document.getElementById("App"),t=document.getElementById("UnsupportedBrowser");!function(){try{var e=document.createElement("div");e.style.display="-webkit-flex",e.style.display="flex"}catch(e){return!1}return("flex"===e.style.display||"-webkit-flex"===e.style.display)&&"MutationObserver"in window}()?t.style.display="block":e.style.display="block"}()