3D Inflate won't render due to unknown error

Hey community!

I've been using the new 3D updates to create some really nice digital art for my store. Lately, however, after using '3D > Inflate' succesfully at least a dozen times, AI has been crashing on me and I've had to force quit.

This is the error message: The operation cannot complete because of an unknown error [PARM].

At first my files wouldn't render hi-res. Now it won't inflate at all. I've tried changing my file size from screen to large and nothing. I've successfully been able to render larger files just within the past few days. Suddenly, I can't produce anything and it's seriously slowing down business! Please help!

(working on macbook pro, 2016. latest version of OS)