It’s probably, because of the Russian characters in the name. You need to check Allow cyrillic checkbox in the “Allow cyrillic characters in the name” option in the Advanced Configuration section in the Super Socializer > Social Login section in the admin area to fix it. After this, you need to delete the user and login again via the same account.
As Yandex doesn’t provide email address of the user with other profile data, you need to check Email required checkbox in the Advanced Configuration section to prompt them to specify the same OR you can leave it unchecked for the plugin to create a dummy one as you mentioned in your post.
Thanks for the answer, but the checkbox is enabled Allow Cyrillic (that’s the problem
Oh. Then shoot an email to support[at]heateor[dot]com so that I could assist you further.
