I found this thread (link) and tried to use the uploaded .pvsm file, along with the bath.vtk and jpg. I got the same error as the original poster (https://discourse.paraview.org/t/how-to-overlay-google-map-image-onto-elevation-data-from-a-vtk-file/3288/11?u=datathing) but I couldn’t figure out how to follow the final piece of advice:
I cannot see a way to apply the texture on the WarpByScalar output, but I’m sure this is just a lack of familiarity with the UI. I tried searching the User Guide and searching for related topics but couldn’t quite get it.