I had this Configuration Error 213:5 come up recently for an artist I was helping. He was on a MAC running Photoshop CS5. This error came up when we launched Photoshop. It would lock up Photoshop and after clicking ok on the error, Photoshop would just close.

I tried resetting the Photoshop Prefs (Shift+Command+Option when starting Photoshop), but we could not get the reset prefs dialog to come up.  I then tried manually deleting the prefs folder located here

Mac OS X: Users [username]; Library; Preferences; Adobe Photoshop CS5 Settings

I then uninstalled Photoshop by using the uninstall shortcut. I then installed it again and got the
error. I looked online and found this web page from Adobe.

http://kb2.adobe.com/cps/827/cpsid_82744.html#main_SLStore

It mentions to make sure the permissions on this folder

/Library/Application Support/Adobe/SLStore

Match the permissions below.

drwxrwxrwx root admin

That folder already had the correct permissions.

After trying many things, I finally figured it out.
The permissions also had to be applied to the two files inside the
/Library/Application Support/Adobe/SLStore folder.

I couldn’t change the permissions from the shell.
I had to do it from the gui.

Mac OS X 10.5 and 10.6

Using Finder, navigate to the folder to be modified.
Adobe PCD folder locations
SLStore folder locations
Control+click the folder, and select Get Info.
Expand the Sharing & Permissions section.
Click Details to show the various owner and group options.
Click the lock icon in the lower-right corner.
Enter your administrator username and password when prompted, and click OK.
Set the permissions according to

Mac OS:

Owner = System = read/write
Group = Admin = read/write
Everyone = read/write
Or from the terminal, drwxrwxrwx root admin

Now Photoshop launches fine.