This has a few suggestions to try and overcome the same issue:-
https://forum.videohelp.com/threads/370533-tsMuxeR-giving-Reading-buffer-overflow-error-at-47-4
and the 3rd post down (and onwards) in here - https://forum.doom9.org/showthread.php?t=175120&page=4 gorilla tag
and the forums at http://www.thestarwarstrilogy.com may also be a good place to see if others have had the same / similar issue and how they overcame it.
Good luck with it mate 😃
V1.3 looks so much better than version 1.0, which is already pretty great. Amazing colors and contrasts! I’m not letting up, but I’m going to have to dig deeper to find out what’s wrong and how to fix it.