Permissions 0664 for 'Nopez.pem' are too open. It is required that your private key files are NOT accessible by others. This private key will be ignored. code example
Example 1: it is required that your private key files are not accessible by others
$ sudo chmod 600 /path/to/my/key.pem
Example 2: private key is too open
chmod 600 ~/.ssh/id_rsa