Use the methods described below
SmartScreen Cannot Be Reached Right Now Windows 10 | Disable SmartScreen
The Windows error message “SmartScreen cannot be reached right now” occurs when the SmartScreen feature is unable to scan the contents of your file. You might be trying to install an app and since your PC’s security feature is unable to verify that your file is safe, you are getting the above error message. There are a few ways to fix this error on your PC and we will show you how.
SmartScreen can't scan your file because your internet connection is down, Microsoft's servers are down, there's a minor glitch on your PC, your VPN or proxy server isn't working properly, and more.
Your internet connection is the first thing to check when SmartScreen is not working. Your connection may be down, which is why SmartScreen can't connect to the internet and figure out if your file is safe.