When upgrading from an earlier version to v12, if the authorization for a user utilizes comma separated items for folders, the search functionality will return no results.
This was caused by an internal error where the use of comma-separators caused all folder entries to become unreadable by the lucene search index.
To work around this issue, you can modify any folder permissions to one item per line.
The issue was found and fixed with:
Automation.Engine 12.1.5 in AutomationEngine released 05-20-2019
Automation.Engine 12.2.3 in AutomationEngine pending release.
Hotfix-Description: No search results if user authorizations use comma separated folderpaths
An issue has been solved where comma separated folderpaths in the users authorization were not considered for the lucene search. No results were shown for these folderpaths.