No results found only in webport library serach

Hello, I am using the Pipeline Pilot 2026 version, having upgraded from PP2021. When searching for protocol library via the WebPort interface, I almost always receive a "NO RESULTS FOUND" message; however, searches performed via the Client looks work well. I have already rebuilt the indexes and restarted the services via the Admin Portal. What should I do next to ensure that searches return results in WebPort?

OS:Windows 2022