Searching from the home screen works for me. Can you open your browser's developer console, replicate the problem, and see if there are any errors in the browser dev console?
Jellyfin 10.10.7 (Docker)
Ubuntu 24.04.2 LTS w/HWE
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
4x WD Red Pro 6TB CMR in RAIDZ1