I recently installed Cubase 9 and Groove Agent 4 on a new computer. I immediately noticed something was off about Groove Agent. First, there was no visualization of the drums. Next, there was no Acoustic or Percussion agent. I downloaded the latest Groove Agent zip form Steinberg and reinstalled. Same issue. Not sure what is going on. Any help would be appreciated.
I got a similar problem with a Windows 10 workstation. I fixed it with the reinstall of all groove agents with the “all users” parameter. After I have also renamed as “old” the hidden directory “Groove Agent Common” in/AppData/Roaming/Steinberg (verify before that there is no file inside !).