Ladybug launch problem in Rhino7

Hi gus, I have some problem with ladybug tools in Rhino7. All components report following error:

  1. Solution exception:Failed to import ladybug:No module named ladybug.epw

I installed both Rhino6 and Rhino7, before I installed Rhino7, I installed 1.2.0 version ladybugs already and it work well for Rhino6.
Any solutions for this error? Or it is impossible for ladybug tools to work for both Rhino6 and Rhino7 simultaneously?