The Create button is grayed out in Vault Sandbox when creating a study site, but the button is still functional.
Sandbox Vaults have soft limits on things such as: sites and users in comparison with a Production Vault. Although Vault licensing shows a license for 10 sites, it does not block from adding more sites in a Sandbox environment, for testing purposes.
Once the license limit is reached in a Production Vault, a user is not able to add more until that license is updated to allow more sites.
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