The problem is likely relayed to a regional firewall which limits google downloads. You can try posting to the actual Ladybug forum at: https://discourse.ladybug.tools/ but I would guess they will tell you the same thing.
thank you for your Response!
Unfortunately i connot explain how a Firewall could bring Up the Problem, as i tried it with several vpns and mobile Data Hotspots.
Thank you for your Help anyway!