[Copilot] Invalid yaml configuration should lead to a speaking error message

[fashxp]

Affected Version

2026.1

Affected capability

Copilot

Steps to reproduce

Create a copilot configuration with an invalid yaml step config

Actual Behavior

just a generic 'something went wrong' error message is shown

Expected Behavior

show a more specific error message - we even would have the information in the request response...