I found that iCloud Private Relay forces me into a Captcha (I HATE CAPTCHAS) with archive.{Whatever}. Turning it off restores unencumbered access. It seems to

I found that iCloud Private Relay forces me into a Captcha (I HATE CAPTCHAS) with archive.{Whatever}. Turning it off restores unencumbered access. It seems to block or encumber Nothing else that I have tried, which is considerable. YMMV, but perhaps this info is useful to you in diagnosing your problem.