Database Cloud Service Provisioning Fails With “Cannot access Object Storage using the subnet with the following OCID”

While creating an oracle Database cloud service (or the new name “Oracle Base Database”),

and after passing all the required information, and then clicking “Create DB System”, I received the following error:

Cannot access Object Storage using the subnet with the following OCID: ocid1.subnet.ocx.zz-yyy-xxxxxx-1.aaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx. Review your VCN configuration. If you need further assistance, contact Oracle Support.

From the following MOS document:
[OCI DB]: DB System Provisioning Fails With “Cannot access Object Storage using the subnet with the following OCID” (Doc ID 2923987.1), they mentioned:

For DB system provisioning to be successful, VCN used for DB system provisioning should have object store connectivity.
Ensure VCN is configured with required rules as per the document below:

https://docs.oracle.com/en/cloud/paas/bm-and-vm-dbs-cloud/vcnsubnets/index.html

After some research, I found that I have to create an Egress security list rule for the private subnet holding the new database, as per the following section:

I created this rule as follows:

This fixed the above reported error, and database creation proceeded without error.

Thanks
Ahmed