Unhandled Archive Type

This just means the zip file is corrupt, such as the download timing out, no write permissions making a 0 byte file, security software scanning and locking the file interrupting the download, etc...

To solve this what you  do is delete Scrapebox (assuming your getting this when you are trying to Install Scrapebox)  and retry with a fresh download.

OR

Try going to Options > Select Download Server, and selecting server #2 instead.

OR

Try whitelisting the ScrapeBox folder in all security software to ensure nothing is blocking it, and ensure ScrapeBox is in a folder on the desktop or a location with write permissions (such as the a folder in the documents folder).