I updated to the latest versions of Play (v2.0.18) and VE Pro (v4.0.6150, both master and slave) and tried to add a SD2 plugin to my slave PC's VE Pro (64-bit) and I still get the "Could not creat plugin play_VST_x64". I'm having a deja vu :/
I got it working yesterday just once, but I haven't been able to recreate it. I've tried everything, including an empty VE Pro (not server) instance with no other instances open. In my VE Pro instances, I have VSL sounds, plus many Kontakt's (v4.10.3681, loading samples in background) and MidiOverLan. In my master, all VE Pro plugins are in Bidule.
Any ideas?