Hard to stop playing with vcv rack today 
but ran into some things:
on ubuntu linux it runs brilliant as stand alone!
i tried integrating it into daws, and this was mixed:
bitwig = worked
Mixbus and ardour: i got errors while trying to load the plugin
there is a thread over in the ardour forum with some insights, maybe interesting for some people (with more knowledge than me)
all in all a fantastic start. 
Seconded here. Pro standalone on Ubuntu Studio 20.04 runs with no problems.
I had a bit of faffing to get the VST running on Bitwig 4 but solved it by copying the .so files into sub folders under ~/.vst. So it looks like
~/.vst/VCV Rack 2/VCV Rack 2.so
~/.vst/VCV Rack 2 FX/VCV Rack 2 FX.so
Hope this helps someone!
VCV 2.0 is superb, many thanks to Andrew @Vortico and all the devs. Great job!
I just put mine in the base of ~/.vst and it worked with a rescan. So far works in Renoise and Reaper.
Robin Gareus analysed the problem:
Hopefully the future lv2 version will make VCV in Ardour possible