The image was in the article that was hosted on the author's site. The post/comment only linked to this blog post. But anyway I don't remember any urls
I have the same problem every time I start a new project. I’ve tried Tailwind, but it takes too much time for me to style something normal. Material UI/Vuetify have a lot of shadows which don’t look good. Recently I tried Ant Design (for React, haven’t tried for Vue) and it looks quite good and it’s easy to use.
Try to unblock all phone numbers and resend the OTP.
I once couldn’t receive an OTP from mobile operator unless I unblocked some spam sender (they had alphanumeric caller ID). I guess they use same service/number for sending SMS?