Universal Containers (\)C) is on the Unlimited Edition of Salesforce orgs. Currently, there are four Developer Pro sandboxes used by dev teams for various purposes, one partial copy sandboxes used for training, one full sandbox used for user acceptance testing. There is another full sandbox used for performance testing during the initial launch, and it is no longer being actively used.
A system administrator had reported yesterday that none of the sandboxes can be refreshed.
What is the most probable action an architect can help the system administrator with?