Hello -- I've used various releases of the holotoolkit, most recently the 2017.2 rc2. I've tried it with Unity 2017.3.1f1, 2017.4.1f1 and 2018.1.0b13 I keep getting exceptions like this during runtime "Exception thrown at 0x76E62552 in arvisualizer.exe: Microsoft C++ exception: _com_error at memory location 0x0CCB9C38." I've even removed or deactivated absolutely everything in my scene except for the main camera. I've tried multi-pass rendering, single-pass, .net 3.5 runtime, .net 4 runtime, il2cpp backend, .net backend (with this version of holotoolkit i seem to only be able to use il2cpp, so vuforia isn't an option). I have no idea why this exception is being thrown, but, as one might expect, it significantly affects performance. Any clues? Has anyone else encountered this?