Import AAF Err: FFFFFC2B with Davinci Resolve

I can’t get anything to export / import correctly. Even if I re-import into a new project in resolve what I have exported, bits are missing. I have checked the sample rate as suggested, and the music files were 44.1Khz so I’ve corrected that. The main video files are MXF and I am wondering whether that has anything to do with the issues. I am going to transcode all the video clips to ProRes movs and try another export.