Error message trying to download Ladybug

I’ve tried numerous times to download ladybug into rhino7/grasshopper and keep getting this message when i double click on the toggle button to change from “false” to “true” as directed.-
MESSAGE:
Ladybug Tools installation folder already exists at:
C:\Users\Fer----d\ladybug_tools

Runtime error (PythonException): Download failed with the error:
The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.

Traceback:
line 67, in download_file_by_name, “”
line 127, in script
END OF MESSAGE

What should i do? suggestions appreciated