InvalidArgumentError while trying to plot the coverage map in RIS tutorial notebook

[ashwinsathish]

Hi

I've been trying out the RIS_tutorial.ipynb and encountered

'InvalidArgumentError: cannot compute ConcatV2 as input #1(zero-based) was expected to be a float tensor but is a int32 tensor [Op:ConcatV2] name: concat'

in the cell that plots the coverage map. Would appreciate any assistance in resolving this

Thanks