I am having a similar situation with Miroslav Philharmonik but the old version. Up until a few days ago it was working perfectly, no I can't get it to load on Cubase 8 Elements using the VST manager. Everyone has advice on how to correct this, mover files to the hard driver, move them out of the hard drive or move the kitchen into the garage and the cars into the living room until you have taken so much advice you can no longer operate. I don't know if it is an IK issue or a Cubase issue. All I know is that it worked, and then one day it didn't. I have two projects now on hold over this and all I can do it sit.
But I am a musician, not a computer programmer. If you want to know about open reel I can give you some advice, but this is beyond me.