You can do that:
1. Install the latest foo_input_sacd v1.5.18
2. Select in your playlist this WavPack file.
3. Check track Properties->Details. To be playable, the "Subsong index" parameter must be 0 for singletrack files. If it's 1, then remove this track from the playlist.
4. Add the track again and check that "Subsong index" is 0. If it's not, reload track info.
5. Try to play.
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You can do that:
1. Install the latest foo_input_sacd v1.5.18
2. Select in your playlist this WavPack file.
3. Check track Properties->Details. To be playable, the "Subsong index" parameter must be 0 for singletrack files. If it's 1, then remove this track from the playlist.
4. Add the track again and check that "Subsong index" is 0. If it's not, reload track info.
5. Try to play.
WavPacks are VBRs, aren't they?
It shows what WavPack library gives as bitrate.