Samples going missing in Kontakt

Not sure if this is a Cubase 10.5 problem or something to do with Kontakt which I’ve updated to v 6.2 today but I’m trying to finish a tune using NI Una Corda and I keep getting the message in Kontakt: “A sample has gone missing - please make sure all external drives are connected”
Actually more than one sample goes missing and every time it happens it seems to be the same ones on the same velocity layers.
Have reinstalled Una Corda but it keeps happening.
Weird! - Anyone else having this?


If you get this message from Kontakt, then it’s on NI side.

OK, will take it up with NI