Okay, just set it up on a second site https://socialmediadoesnothavetosuck.com and one person was having an issue signing up using safari browser. another had a challenge registering with a canadian yahoo address on an iphone she didn't get the 2FA message. The first person was able to ultimately create an account. I tried to create an user account for the 2nd person, but it didn't work. so we are still sorting through that one.