This is usually some kind of firewall issue or something in your network security denying the "setup.exe" program access to the URL listed in your log file (and the subject of your request). So far, though, I have yet to hear of a case where simply pointing a standard browser (Chrome, Firefox, Edge) at the URL doesn't allow it to be downloaded and the installation to succeed. Please try that workaround now.
If it does fail, then your best option is to move to the "unplugged" installers which can be downloaded in a ZIP file and installed locally. Look for the link on the main installation page to "unplugged" installers.
Hope this helps to get you set up. Thanks for providing the screenshot and log.
--Brendan