Server refused public-key signature despite accepting key
I created a user with root privileges, but when I try to log in as root, I get the following error: Server refused public-key signature accepting despite key. And the server asked me for a password, but I have no password because I should access through ssh key.
But if I go to the server with the user I created with root privileges, it works well with ssh keys. I use the same key for both root ssh to the new user. I generated the key with PuTTYgen.
I use Nginx.
How can I solve that?