Import data into Deployment fails with error “We ran into a problem and could not import your data"

Summary:

Hi! I’m trying to Import data into a Deployment, but fail with error “We ran into a problem and could not import your data”.

Content (please ensure you mask any confidential information):

The build deployment job executes successfully (it's a DV environment, but the option is unclicked to not include the application version in the URL) … then on the environment’s list of deployments, on the right hand side action menu I lock the deployment, then try to Import the zip that I created previously from the app / Data Manager / export all data … but it fails with the above message.