WoW shows CAS System Unable to Initialize ClientHandler – what to do?

A new WoW patch, especially if it is as extensive as the pre-expansion patch, always has the potential to produce error messages that have not been seen before. And so it is with the pre-update for WoW: Dragonflight. WoW Patch 10.0 has been bothering some WoW fans with the following message: “CAS System Unable to Initialize ClientHandler” and sometimes “initialization error: failed to create storage component” is also attached. What can you do there?

CAS System Unable to Initialize ClientHandler

The error itself doesn’t say much, the part after that, if one is displayed to you, is interesting. In the case above, it seems to have something to do with the client not finding enough space on the hard drive – and this has been reported by many WoW fans in the past. They shuffled a few pieces of data back and forth, and the game launch worked.

If this doesn’t fix the problem, the Battle.net client may be deluding itself that it doesn’t have the required rights to modify data under your Windows or Mac login – something that is of course essential is when you download a patch for a game. the Help articles at Blizzard itself will then give you some hintswhat you can do in that case. By the way, this is not a step-by-step guide, but several things you could do to get WoW running!

Windows

• Enable secondary login
• Run game as administrator
• Disable read-only settings for the WoW folder
• Deletes the “Indices” folder in the “World of Warcraftdata” folder
• Scan and repair the game
• Creates a new administrator user account

Mac

• Repair permissions on shared folders
• Repair Disk Permissions
• Repair permissions on the application support folder
• Scan and repair the game
• Creates a new administrator user account

Sometimes that doesn’t help either?

The WoW community at Reddit has another solution in case you don’t want to resort to last resort, which is to uninstall and reinstall World of Warcraft (buy now ) would. Here’s what helped at least for Warlords of Draenor six years ago (2016). We have adjusted the description below because the layout of Battle.net has changed in the meantime.

1. Opens the Battle.net launcher.
2. Select your World of Warcraft installation that is having problems, left click on the options cog just to the right of the refresh or launch button and select Game Settings.
3. Under World of Warcraft, check the Additional Command Line Arguments box.
4. In the blank line that appears, type “-uid wow_engb” (without the quotes) and click Done.
5. Starts the game.