Sushi failed to execute [traceback and sample provided]

[Asinin3]

When I try to run Sushi on the fourth episode of a show I have, it gives me the following error:

WARNING: Detected possibly broken segment starting at 0:45:47.56, increasing the window from 10 to 30
Traceback (most recent call last):
  File "sushi.py", line 840, in <module>
  File "sushi.py", line 834, in parse_args_and_run
  File "sushi.py", line 675, in run
  File "sushi.py", line 467, in calculate_shifts
TypeError: unsupported operand type(s) for -: 'NoneType' and 'float'
Failed to execute script sushi

I've re-checked the files and also tried demuxing the audio streams (aac source and flac destination) and using the audio as an input instead of the video files but nothing helped.

Audio files, script and output log here: https://drive.google.com/open?id=1AhdPiWiV6sox5Cl_5p9bOobwJAfH_Yym

[Asinin3]

Nevermind it seems it's because the Blu-Ray doesn't have the preview at the end and it cant find anywhere to place the subtitles.