Note: Duplicated because I can't reply to my own post
E000018: Importing RPR file failed.
Replying to david_s:
AMD TR 3970x
NVIDIA RTX Titan x 2
Attaching my Maya project, RPR file and .config JSON.
I am also attaching more info on the latest error I have come across:
#define RPR_ERROR_INVALID_PARAMETER -12