SLOW AS HELL!
So super slow that it is unusable. Installed 9.1 and it actually works!
After a clean install of Catalina Adobe Bridge 2020 works fine.
I migrated all data manually! Preferences I have not migrated.
Bridge 2020 is slow here to under Mojave an Catalina. It is unsusable to use. It seems, scanning or caching a folder takes a lot of time. This not occours in Bridge 2019.