Support backup configuration

**Problem**
When working with handlers, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

Start by locating the handlers involved in the reported errors and read how their current messages are produced. Clarify the expected backup configuration behavior and error cases, then verify that messages are more descriptive and support debugging and maintenance.

Written by the indexing model from the issue text.