Every time I attempt to rebuild my search index (manually), I'm redirected to "tiki-admin.php?page=search&rebuild=now", with the following error appearing at the top of the page "Rebuild in progress". I've successfully rebuild it in the past. I'm using tiki12.1 now, was using 12.0 before. Thinking there might have been a glitch in 12.0, I decided to upgrade 12.1 after the error message started popping up, but I'm still getting the same error message on 12.1.
I didn't make any changes to my tiki since my last rebuild, other than writing new articles. If anyone know how to fix this, please let me know.