I'm sorry, the only help I found about it is in French : [FAQ] Liste des problèmes techniques connus et leurs solutions
(I translated the first part with google translate, so if it is not good, not my fault !) (but the link ARE in french, so it is your turn to use it 
)
QuoteDisplay MoreThese errors can occur during the installation of the launcher or an update and are due to a problem connecting to the update server.
Do the following manips in order:
- First Checks To Be Done In All Cases
- Check connectivity with servers
with commands
ping -n 20 update.aion.gfsrv.net
tracert update.aion.gfsrv.net
Post screenshots of the results of both orders
- Check the quality of your connection
with the command
pathping -q 250 update.aion.gfsrv.net
Stretch the command window up to show the entire response of the pathping command, then post a screenshot
- Check TCP connectivity to a given port
with the command:
telnet update.aion.gfsrv.net 27500
And let us know if you can make the connection
Hi Tyreen ,
If your technical problem still persists, you can send ticket to our Game Customer Support here: http://support.gameforge.com.
Best regards and have fun in the game. 
