I’m having that problem with Kontakt on Cubase.
A friend which is using Cubase 9 suggested modifying the file in the path.
"C:\Users\John\AppData\Roaming\Steinberg\Cubase 9_64 named ‘Vst2xPlugin Infos Cubase.xml’."
I have Cubase 8 Elements and I couldn’t find that path.
Where is that file?