Locked Toolkit conversion error message

[rigby2222]

i am trying to convert a song from PC to Mac and it usually works great, but with one song I get an error message. " System security cryptography exception: IV length is different from block size"  I'm a novice at this so I'm not quite sure if there's something I can do to correct this.  Any help would be appreciated.

[fabianosan]

Post here the package with issue please or what's the song.

Thanks.