Thanks Lauren, I definitely don’t want to muck up this thread. I do apologize but I found out that one of our guys altered on of the find child property nodes, and that alteration is causing the crash. I’ll get with him, and see if his changes are still necessary. Thank you so much for your time!
No worries 
Glad to hear you all are trying out Material Layering and look forward to any other feedback!
Where are these Shared Inputs in 5.1?