Sounds like this is a known issue. This thread has the latest including additional steps to take. I was able to download the installer using the links provided.
Greetings, all!
We are seeing a large influx of reports of the Failed - Network Error recently. We are aware of the issue and our team is looking into this issue. This is a common error to occur when there is a problem with connecting to our patch servers. In the mean time, we would like to provide troubleshooting and workarounds for this issue and return you back to the game.
Note: This issue is an issue with the download file within the browser. If you are experiencing installation issues wi…