VIRB Edit 5.3.1 - 5.7K stitch doesn't work

My laptop is a quad core i7, 8gb Ram with Nvidia GTX 850m

VIRB edit doesn't work when stitching 5.7K footage, the status bar gets to 100% then a message appears saying VIRB has failed to stitch the clips. I've tried changing the encoder settings with no effect.

I have another much less powerful laptop and the stitching works fin, but takes much longer. I have a feeling it may have something to do with the Nvidia graphics card as others with this issue have had NVidia cards too.

Thanks for any help.