I get 401 errors all three time, because I use web browsers that don't leak enough personally identifiable information to prove that I'm not a robot.
You don’t need PII to prove you are not a robot. See Privacy Pass. And I don’t know how a website is somehow going to verify your PII as not-fake, anyway.
Likely you just use a shit web browser.
I doubt you are regularly getting 401s because of this.