Safari won't load pages after system restore
This could be a problem with the wrong version of Safari, or it could be a problem with its cache or preference file.

Start by deleting the cache folder, located here:

~/Library/Caches/com.apple.Safari/


If that doesn't work, delete the preference file here:

/Users/sklein/Library/Preferences/com.apple.Safari.plist


If the problem persists, delete Safari (by dragging it to the Trash), then reinstall macOS High Sierra from Recovery.

The reinstall will take a while, but you won't lose any apps or data.