It is not possible to convert .aifr files to .wpl files, simply because the first is audio and the second is playlist. You can only convert audio to audio or playlist to playlist, but not between them. As such aifr to wpl conversion is certainly not doable.
Updated: January 3, 2023
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
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