I Face such issue
When I create user on the web-site
it`s written that "e-mail sign ups is disabled''
Here is a resposne message:
{"code":"email_provider_disabled","message":"Email signups are disabled"}
Update:
I turned off "enable e-mail signups" and turned it on again.
And now I have another response message:
{"code":"unexpected_failure","message":"Error sending confirmation email"}