SLES Registration error

I am getting error while registering EC2 SUSE instance .
Command - /usr/sbin/registercloudguest --force-new
Error are as below:
2021-04-23 22:00:06,173 INFO: No cert found: /var/lib/regionService/certs/34.197.223.242.pem skip this server
2021-04-23 22:00:06,173 INFO: Using region server: 54.253.118.149
2021-04-23 22:00:06,173 INFO: No cert found: /var/lib/regionService/certs/54.253.118.149.pem skip this server
2021-04-23 22:00:06,173 ERROR:Request not answered by any server after 3 attempts
2021-04-23 22:00:06,173 ERROR:Exiting without registration

Also, getting below error while zypper refresh
zypper refresh
Warning: There are no enabled repositories defined.
Use ‘zypper addrepo’ or ‘zypper modifyrepo’ commands to add or enable repositories.

zypper update
Loading repository data…
Warning: No repositories defined. Operating only with the installed resolvables. Nothing can be installed.
Reading installed packages…
Nothing to do.