I’m not sure about the error, but even with a successful burn these ISOs do not seem to play with VLC. I have managed to get the extras to work with VLC, but the actual films themselves cause it to crash. (The mkv files are fine with VLC, however.) The films should play fine in a standalone Bluray player, and from memory I believe other posters have had success on their PCs using Leawo Player or PotPlayer software.
Bluto