the 12152 error is a odd error. Its a http error, something is messing with the connection. Its not your settings, its either bad proxies, or like security software/router.
So you can try without proxies as a test.
Also you can add an exception for the entire scrapebox folder in all security software.
Lastly you can add an exception/whitelist in your router, if your router supports that.
An alternative test would be bypass your internet and use a mobile dongle or something to test if its your router or not.