Any change made to the default "user" entity gives me the following error
when deployed:

The object
user.EntityDefs.DirectoryModel.AppConfig.UserAppli cation.IDV-DriverSet.IDVault
contains validation errors and wasn't deployed.

I had created new entities by copying the default "User" entity. I had also
changed the default "User" entity's display label. I'm just sharing in case
these step contributed to the problem.

I've since deleted the entities that were created by copying the "User"
entity, thinking that maybe I should have created them from scratch.
Problem persists.

I've created a new project in Designer and re-imported the driver set.
Problem persists.