The downloaded sketchup sdk is invalid

When I download sketchup sdk( from SketchUp Developer SDK | SketchUp Extension Warehouse, I can download it successfully, but when I try to extract the .zip file , a dialog popup and prompt like this: Cannot open file “”. It does not appear to be a valid archive.

I’m sure I download the .zip file successfully. What’s wrong with it?

Sounds like the file may not have downloaded completely. I would suggest downloading again, and see if that helps.

I reported it a few days ago. There was no reply yet.

There is an erroneous space at the beginning of the zip binary file, you can delete that and try to open it. There are still file path errors in the archive.

Zip viewers that have error handling may then open it after deleting the space, but not all of them will work.