Yahoo openid website compatibility

I use the Dope-openid library on my website, but when logging in with a yahoo account, users get the message above. Click "Agree", enter www.mywebsitename.com using your Yahoo! ID
Warning: this site does not meet Yahoo! website address requirements. Do not share personal information with this site unless you are sure that it is legal.
I do not get this message when I use yahoo openid with stackoverflow or plaxo. Do you need to collaborate or how to register your site information somewhere in yahoo before using yahoo as an openid provider on your site? Does anyone know what I'm doing wrong here ... Thanks

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This page has a good entry and has a link to a sample XRDS document, which, unfortunately, is broken.

But I found a sample document here (scroll down and translate for my frame):

Let the rest discover your third-party using OpenID

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Source: https://habr.com/ru/post/1720351/