Unable to complete version update.

A friend of mine wanted to try ffxiv again.
He had an acc long time ago with trial and has made a new.
But when he tried to install the game he received following errors:

Unable to complete version update.
[30435] [30415] [5] [19900] [5]
C:/Users/Name/Documents/My Games/FINAL FANTASY XIV - A Realm Reborn/downloads/ffxivupdater.exe

We have tried following solutions, but none has worked out:
1. Deleting and reinstalling
2. Allowing ffxivupdater thru Virus & Threat Protection and said solution by Aerissa on the ffxiv forum (https://forum.square-enix.com/ffxiv/threads/423011)

Good morning! Thank you for posting in the Final Fantasy XIV Technical Support Forums.

If you are still experiencing an issue, please be sure to follow these troubleshooting steps below:

- Make sure Internet Explorer/Microsoft Edge is up to date.
- Disable all programs/overlays running in the background. (Found in Task Manager)

Additionally, are you using a wired or wireless connection?

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