Help Obi Fluid 7.0rc - fluids rendering as pink

[Amael]

I'm using Unity 2022.3.32f1, a new empty 3D project (built-in render pipeline) and the Obi Fluid 7.0rc Unity Package. Everything seems to be set up and working correctly (Burst compiler etc.) but all of the fluids in the sample scenes are pink:

   

I've had a look through the components & project resources but can't see anything that's obviously wrong?

   

Does anyone have any idea as to what's causing this? Thanks.