reColorMesh error: invalid literal for float()

Trying to run a radiation analysis with honeybee, script works up until the reColorMesh component, which is giving the error "1. Solution exception:invalid literal for float(): ". My googling suggests this is a python error, but I am no coder so hesitate to start playing around there. Any help would be appreciated!

First of all, without a file it will be complicated to help you.

And there is a Ladybug Forum btw.

http://discourse.ladybug.tools/

SimpleRadiationAnalysis.gh (587.0 KB)
SimpleRadiationAnalysis.3dm (2.6 MB)
Thanks, I will take a look at the other forum. Meanwhile I attached the rhino geometry and grasshopper files for reference.