API Catalog does not serve error stack trace in case of exception

[pavel-jares-bcm]

Describe the bug
API Catalog does not display any stack in case of an error.

Steps to Reproduce

1. simulate an error (ie. change value inside developer console to null or change the source code)
2. BigShield appears a should contain but without any stack in there

Expected behavior
There should be a stack of the error

Screenshots

Logs
If applicable, add server logs collected at the time of your problem.

Details

• Version and build number: 3.5.0-RC1 (and probably previous versions)
• Test environment: localmachine

API Catalog Web UI (in case of API Catalog issue):

• OS: Windows
• Browser: Chrome
• Version: the latest one