The user is unable to assign an AWS account to a Partner Group Billing (PGB) block.
Steps to Reproduce:
1. Add the AWS account under the specified PGB block.
2. Click Update to save changes.
3. Re-open the PGB configuration.
Observed Behavior:
The changes fail to persist, and the AWS account is not saved or assigned under the PGB configuration.
1. Once you have selected the account, click Save.
2. Then, click Update to apply the changes.