@kikems
Living on borried time, I guess - it's probably a regional role-out, but it seems Google is dumping HTML. By default, IBrowse spoofs as an old MSIE version, which you can change in the URL Prefs settings, to access the nice looking plainer HTML version of Google. These old spoof strings are now being completely blocked.
So, switching to a newer spoof string gets us over that hurdle, but unless you are logged in to Google, you're then prompted to accept cookies, etc, which appears to be implemented entirely in JavaScript and does not appear or work in IBrowse.
Fortunately, I can still login to my Google Workspace account using IBrowse, using the JS bypass hack, and after doing so Google search does then work, but it obviously looks terrible compared to before.
I've mentioned the JS login hack before - I have
javascript:void((document.getElementById('bgresponse')).value='js_enabled')
as a URL entry in my Macros menu, which I select on the page before the error page that usually pops up during attempted logins. But, I'm not sure if this still works on regular Google accounts.