This is because you may be using the Steam version, and in it the SFX folder is called AGGIE.
Therefore, the bat installer, does not find the required path.
C:\Windows\System32\!_AUDIO_Akula\A_kula\sfx\*.wav
should look something like this:
C:\Windows\System32\!_AUDIO_Akula\A_kula\aggie\*.wav
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