What is the name of the domain?
What is the error number?
1323
What is the issue you’re encountering
You cannot add or modify subscriptions or services until all invoices are paid. Download each “Unpaid” invoice on your Billing page and click the “Pay online” link within each invoice to fix your account (Code: 1323)
What are the steps to reproduce the issue?
When I try to select the Free plan. I had no unpaid invoice at all.