bnk-extract: wpk.c:32: parse_header: Assertion `memcmp(wpkfile->magic, "r3d2", 4) == 0' failed.

[TheCorruptCat]

how do i fix this

[Morilli]

Sounds like the file you're trying to use as audio file is not a proper wpk file. Make sure you use either a .bnk or .wpk file as audio file.