Which App did you "upgrade? Lightroom OR Lightroomn-Classic? And which VERSION NUMBER?
Lightroom v5.4 (Cloud version) does not allow Plugins other than the default Photoshop.
COMPARE LR & LR-CLASSIC (Lr Queen)
Regards. My System: Lightroom-Classic 13.2 Photoshop 25.5, ACR 16.2, Lightroom 7.2, Lr-iOS 9.0.1, Bridge 14.0.2, Windows-11.