Never heard of this
I got this message from buyer, not sure why? I have sold items before! hello, I'm reaching out because I've been attempting to purchase for a few minutes now, but I consistently encounter an error when I click the buy now button. I reached out to customer support, and they clarified that the cause of the error is linked to the setup of your account. It appears that you have configured your account in a manner that restricts new users from completing purchases, and I happen to be a new user. As a resolution, they suggested that I pass along this link to you. By doing so, you'll have the ability to enable any other user facing the same issue as me to successfully make a purchase from you, and I'll be able to proceed with my transaction as well.
eburtonlab
Mentor2 years ago@g.only2ofus
That is a common scam to get you to follow a link and provide your account credentials directly to the scammer.
There is no way to block new users, thus there is no way to unblock them.