I faced an issue with strange crashes of Plugin Alliance and Overloud Plugins.
DS Thorn and Dopamine crashed.
The root cause was the Slate Digital Plugin VBC 1.2.14.5 FG-MU.
I did a test case and Ableton Live was crashing too.
After investigation together with Support of Slate Digital the solution was not to use this version but to stay on the older version.
I asked then what to do when one wants to upgrade to Catalina, as the older version is not certified.
Will post the answer as soon as I get it.