Postman : socket hang up
For me it was because my application was switched to https and my postman requests still had http in them. Changing postman to https fixed it.
postman-collection-runner
Postman – How to move collections between Workspaces?
Share a collection To Workspace, select yours, and make sure you checked “Share collection and remove from this workspace” Voila! Note: Worked on version 7.34.0.