For standalone accounts where one of the associated services is EC2

In versions 20.1/20.2/20.3-20.3FP7, for accounts in which multiple regions are associated with the EC2 service, individual S3 buckets are used to store the permissions for each region.

In 22.1 FP1, this has been modified to use only one S3 bucket to store the permissions for all regions, irrespective of the number of associated regions.
Note: For accounts with only one associated service region, skip the following steps, since only one S3 bucket includes all permissions anyway. For such accounts, trigger Fetch Config manually from the inventory page.