Steps.
Load Maschine 3.1
Add FX to group
Try to select Guitar Rig 7, but not showing in the list (image attached)
Try viewing Guitar Rig 7 presets, which you can see from the next image that Guitar Rig 7 is there. Select Guitar Rig 7 and presets show. Select one of the presets and error message appears.
Guitar Rig 5, 6 and 7 all work in standalone and also when added as inserts in Cubase 14.
Am I doing something wrong is it this a bug in Maschine 3.1. Other Native Instruments FX work as normal.