Did you update to the most recent OSX?
NDSP just released an announcement that there’s a compatibility problem with the new version:
"We have received reports of a compatibility issue with yesterday’s release of macOS 14.4 Sonoma on Apple Silicon Macs.
This issue affects plugins from all manufacturers protected by PACE / iLok when used with AU host DAWs such as Logic. Therefore, if you use Audio Units on an Apple Silicon Mac, please defer your update until more is known.
We are contacting PACE and will update you once we find a resolution."