VST Instrument plug ins not working

MacOS Mojave. In Media tab Grove Agent SE (and a few others) shows up in color but when I click on it all the instruments are grey. Tried reloading the full 9.5 pro package 3 times with the same result. VST Plug-In Manager shows the correct file paths and it looks like the files are there. I’ve refreshed anyway. Still instruments are greyed out. Any ideas? I must be missing something basic.