Silent failures in certain edge cases.

**Describe the bug**
Currently, when there are missing collection types, roles or other inconsistencies between environments, the import will fail on the server, but not on the client resulting in silent failure.

To fix, we need to throw an error in such cases. This should be a fairly simple fix, if anyone is interested in chipping in - a PR is most welcome 🙌🏼

Trace the import handling for missing collection types, roles, and other inconsistencies between environments on both the server and client. Reproduce one of these cases and verify that the client throws an error instead of completing with a silent failure.

Written by the indexing model from the issue text.