How can I call POST integration from another integration in OIC ICS

Summary

Child integration is failing while calling from parent

Content

I was trying to call child integration which is REST POST from my parent integration which was also REST POST. It is failing with following error.

when i am running child integration with same parameter from postman then it's working correctly. so both integration are working fine but only problem is, it's not getting called from parent integration.

Has anyone faced such issue or worked on similar requirement? Any pointer or help is appreciated.

 

Thanks,

Hemen