If the method above does not work, or if you prefer to keep your plugins in the global Library folder, you may need to grant the installer "Full Disk Access."
ERROR: Cannot create Soundtoys version root folder at Soundtoys 5" Cubase stops working usual 3 options debug, close, etc. Soundtoys 5 released! - Page 4 - Gearspace If the method above does not work, or
typically occurs during the installation or initial launch of Soundtoys 5 If the method above does not work, or