we can’t help with your unity env (not at all supported from opencv)
what do you expect us to find in your error logs ?
also, the arcane cascades are superseeded by cnn based methods now
(and there are plans to remove them entirely in the future)
basically, that’s a “file not found” problem.
what makes it worse is - your “assets” folder is not accessible to plain c functions (it’s probably inside some zipped apk)
look how the android demo is trying to work around it
(by copying it to some accessible location):