Pianoteq goes silent with microtonal .kbm file

Hi,
I have used this .kbm and .scl file successfully on Surge, but as soon as I load the .kbm file, I can see that the piano notes are being triggered, but there is no sound.  If I do the sound test from the options - that still works.  This is a 16 note per octave scale.

Can anyone help me by getting these files to work, please?  Doesn't seem to matter what Pianoteq instrument I use - it's working fine with the defaults, and then no sound as soon as I load the .kbm file.

Thanks!

Here's the .kbm file content:
! Gaia.kbm
! Size of map:
0
! First MIDI note number to retune:
0
! Last MIDI note number to retune:
1
! Middle note where the first entry in the mapping is mapped to:
95
! Reference note for which frequency is given:
95
! Frequency to tune the above note to (floating point e.g. 440.0):
388.36
! Scale degree to consider as formal octave:
16
! Mapping

And here's the .scl Scala file content:
! JS Gaia2.scl
!
16 Gaia harmonic scale
16
!
135/128        1:Ab Exp
!2187/2048     x:Ab Gaia
18225/16384    2:A  432
9/8            3:A  Gaia
1215/1024      4:Bb Exp
!19683/16384   x:Bb Gaia
5/4            5:B  Exp
!81/64         x:B  Gaia
675/512        6:C  432
10935/8192     7:C  Exp
!177147/131072  8:C  Gaia
45/32          8:C# Exp
!729/512       x:C# Gaia
6075/4096      9:D  432
3/2           10:D  Gaia
405/256       11:Eb Exp
!6561/4096     x:Eb Gaia
5/3           12:E  Exp
!27/32         x:E  Gaia
!54675/32768   x:E  432
3645/2048     13:F  Exp
!59049/32768   x:F  Gaia
15/8          14:F# Exp
!243/128       x:F# Gaia
!15/16         x:F# Exp
2025/1024     15:G  432
2/1           16:G  Gaia