Addictivetips published a tutorial about how to fix "SmartScreen can’t be reached right now" on Windows 10.
How to fix "SmartScreen can't be reached right now" on Windows 10
Windows 10 proactively scans for and blocks threats to a system. It does this by scanning files that are downloaded or apps that are run.
How to fix "SmartScreen can't be reached right now" on Windows 10