When using Orion with a relational database (Postgres), if the database is not accessible (e.g. downtime), when trying to send a payload to Orion, the user receives a `PrivacyGroupNotFound` error. This can be misleading 'cause it doesn't really tell anything about the underlying issue.
How to reproduce
Start Orion using the `orion.conf` file provided
Send a payload to Orion /send
The expected behaviour would be an error messaging informing the user that there was a problem connecting to the database.