Some of you may see a broken-looking import page. This happens because the Site URL and Home URL are not set up properly.
Let’s assume that the site URL that you are importing on is called http://local.wordpress.test
There are 3 steps to ensure that the Site URL and Home URL are correctly set up.
2. Log in using FTP or cPanel and check to see if the lines below are presented in your wp-config.php file;
Once the 3 steps above are taken, the Import page CSS should work properly.