Hello!
Using SF pro 11 (32) with vst 2 (32) and SF pro 12 (64) (build 24) vst 2 (64), as soon as I open an Eventide plugin and touch one plugin's key I got the following error message:
"An error occured while loading a plug-in. An invalid argument was specified." Then I press OK and everything goes well.
Concerned:
2016 stereo room 3.0.4
UltraChannel 3.0.4
UltraReverb 3.0.4
UltraTap 2.0.4
My 2 cents!