ATLAS has come up with a solution on their ILLiad 9.1.1 ISO Service Update to address the log4j security vulnerability page. If you are upgrading ISO ILL, you can verify the version in the ILLiad Customization Manager for the VersionISO will be 9.1.1.0 or higher as the correct version.
You should also make sure in the ILLiad Customization Manager that the Billing Information fields are filled in on the Local Info table: