First of all, try navigating to a website to make sure your connection hasn’t been lost.
If the situation doesn’t right itself, check the error code and follow these steps.
Error 34 [UPDATE_PROXY_ERROR]
This is a problem with your system proxy configuration. Please double-check this configuration, as our Updater uses the settings.
Error 35 [UPDATE_NETWORK_UNREACHABLE]
This error is caused by a problem with your Internet connection. Please double-check your connection.