File failed to build

[gqunukhwebe]

I'm trying to merge the openings and endings into the episodes from https://nyaa.si/view/422420 using unlinkmkv. It has worked fine on other anime before, but it doesn't work with this one because it only gives 4.3 KB files if I use unlinkmkv regularly, and it says "file failed to build" for all episodes. The audio codec is "Japanese, 48.0 kHz, 2 channels, AAC LC" for some episodes and "Japanese, 48.0 kHz, 2 channels, AAC LC SBR (Explicit) (HE-AAC)" for others, and I think that might be the problem. How do I use unlinkmkv on files that have that specific audio codec?