I am trying to use the Rank tool, in the spatial analyst toolbox, and it fails without providing an error message. The message says it succeeded - but the tool failed and there is no output:

This is being used on 4 raster data sets (attached) and the tool is set up like this:

The input paths are:
C:\Spatial_Modelling\Spatial_Modelling.gdb\ROADFUZZ2
C:\Spatial_Modelling\Spatial_Modelling.gdb\SLPFUZZ2
C:\Spatial_Modelling\Spatial_Modelling.gdb\TWNFUZZ
C:\Spatial_Modelling\Spatial_Modelling.gdb\WTRFUZZ2
The output file path is:
C:\Spatial_Modelling\Spatial_Modelling.gdb\FAND
I have also tried using this tool within a model builder with the same result.
I have tried on ArcGIS Pro version 3.3, 3.4 and 3.5.
I have tried a clean uninstall and re-install, cleared the cache and changed input/outputs to folders rather than geodatabases and all results in failure with no error message.
Any ideas how to get this tool to work?