When you have ImgBurn set as the burn engine within Fab be sure to set the write speed to recommended for both Bluray and DVD.
I 01:59:45 Destination Media Type: BD-R (Disc ID: VERBAT-IMd-000) (Speeds: 2x, 4x, 6x)
I 01:59:45 Destination Media Sectors: 24,438,784
I 01:59:45 Write Mode: BD
I 01:59:45 Write Type: DAO
I 01:59:45 Write Speed: MAX
I 01:59:45 BD-R Verify Not Required: Yes
Looks like you didn't configure the 'AWS' correctly in ImgBurn. Your media supports 2x, 4x, 6x burn speeds with the drive you have and it burned at max speed. As AGJ suggest burn at 2x or maybe even 4x but never the max rating of your disc because you'll up the odds of a coaster.
Click the link in my sig and it will redirect you to LUK!s' forum and is much more descriptive on how to set it up, includes screenshots also to make it easier to understand.
A personal suggestion on my part would be to untick the BD-R Verify within ImgBurn (you can do this after a burn has started near the top), it'll just save some wear and tear on your drive and to verify I just watch the disc. The logic being also if the data written to disc from the iso is not correct then what's written won't be either and ImgBurn is simply comparing the data.
