What are the steps to resolve an APNs/Web Push error after a server restart?

After a server restart, it's essential to check your configuration for any changes. Ensure the certificate is still valid and correctly installed. Verify that the provisioning profile is properly configured. Also, check the server logs for any errors that occurred during the restart. If necessary, re-install the certificate and update the provisioning profile. Finally, test the push notification functionality to confirm the issue is resolved.