TGuitar not working in Cubase

I’m finding it impossible to get TGuitar working in Cubase 10 pro. It loads into Halion 6 and Halion Sonic inside Cubase but it doesn’t work. It works inside standalone instances of Halion and Halion Sonic but I need to use it as an instrument in Cubase. Is it just the case that it doesn’t work inside Cubase or am I doing something wrong somehow?