Error occured while opening ironbug

I have installed a proper openstudio and radiance version based on the compactibility matrix.
But Iam unable to open ironbug after installation, Iam getting error while opening grasshopper which I have attached in the photos below.
Iam using a ladybug 1.6.0 which is downloaded from FoodforRhino.
how to resolve this issue??


Thanks in advance