I can't open vst, how can I fix this?

I’m using Cubase 9.5.

Os is in C drive with SSD, Cubase is in D drive with HDD.

I tried to install serum trial, but I confront with problem.

When I install serum, I set dll path to ‘D:\Steinberg\Content\VSTI\xFER’. And presets are installed at C drive’s documetns.

I add ‘D:\Steinberg\Content\VSTI’ at VST 2 Plug-in Path, and cubase found Serum_x64.

I add serum instrument track, but there’s no serum editor interface. Plug-in editor didn’t show serum ui. I wanna show this screen, but I don’t know how to upload image.

After that, I installed serum at labtop, and I can see serum editor. I really don’t know why I can’t use serum at desktop.

I’m really suffering with this problem. Please help me.