##Note##Scroll to the right at the bottom to see the pictures all the wayThere are a few client errors and I'm going to tell you how to fix them.
The first error looks like this:

You can get this error on the webclient and downloadable client.
Steps to fix1. Go to your C drive. Start --> Computer (Also known as my computer) ---> Then open your C drive --> Then look for the file(s) named ErasedPkzcache1 and OperationEpicxCache --> Right Click and delete both of them.
It should look like this

2. Download this file
http://dl.dropbox.com/u/39237166/OperationEpicxCache.zip or at
http://uppit.com/7tq9m4x26d4g/OperationEpicxCache.zip and open it
3. When its open it should look like this

4. Make sure you click the extract button, then extract it to the C Drive. Here's a picture of what it should look like:

From There the cache should be extracted to your C Drive and should work.
Re-run the client or webclient and play. If you get any types of errors or you don't understand this post a reply and I will reply back to you.
Happy Gaming

Edit: I made a video. Watch it