Kitmatic下载镜像报错`unauthorized: incorrect username or password`

• (HTTP code 500) server error - {"message":"Get https://registry-1.docker.io/v2/library/mysql/manifests/latest: unauthorized: incorrect username or password"}
  解决方法：登录的时候不要用邮箱登录，用用户名登录。
  参考：(HTTP code 500) server error - {"message":"Get https://registry-1.docker.io/v2/library/mysql/manifests/latest: unauthorized: incorrect username or password"} #3156