Weaverbird not installing correctly?

Hi,

I have downloaded the latest version of weaverbird however it seems that not all the components have installed and there are some missing. Also, every time I start up grasshopper I get these error messages which I have attached. I am using rhino 4 and grasshopper 8.

This also happened when I installed the latest version of kangaroo for grasshopper, however I fixed the problem when I downgraded to an earlier version of the program. Would anyone know where I could get an earlier version of weaverbird?

Or if not any other way to help resolve this problem?

Thank You.