Symptoms
Typehead Search in Service Portal from a Service Catalog page results in "No Results"
Release
All Supported
Environment
Service Portal
Cause
The current Service Portal does not contain a Service Catalog Search Source. The Typeahead Search instance option contains the Service Catalog Search Source as a default.
Resolution
Open instance options for typeahead widget on the page you are searching from and remove the value from "Contextual Search Result"