What are integration error messages?
When authors run their modules in the TEST environment, they can see error messages for integration actions that fail to execute. This makes it easier for authors to find and resolve issues with broken integration configurations.
How do integration error messages appear?
Integration execution errors normally only tell end-users that something went wrong, to avoid leaking any implementation details, and because the end-user can’t fix the problem themselves.
The end-user interface (the published module in LIVE) omits more detailed information in LIVE mode, and only shows more detail for authors in TEST mode.