I am running Rhino 8 and and Ladybug 1.9. I was attempting to create a sun path using EPW data, but the LB Weather Download module is red and says old. The error message says failed to import ladybug.
It seems you both did not install the plugin correctly as the components can’t find any of the core LBT libraries.
If you are on Windows, I highly recommend using the Pollination Grasshopper single-click installer to install as it comes with Ladybug Tools and everything that you need to run it.
Otherwise, if you are on Mac, you should try running the installer.gh file from Food4Rhino again.