Re: Unexpected error while versioning my character. How do I fix this?

I've not seen this error before.  I would try the basics:

Delete the DiskCacheArena file from the swtor directory.

If that doesn't work, run a repair:

Non-Streaming launcher - Log into the launcher but don't click Play. Check for small letters "ST" in the bottom left corner. If this is NOT present, With the new launcher after login , select the username pull down on the top right and select settings, then press repair.

Streaming launcher - If the letters "ST" is present, close the launcher, right mouse click on the game shortcut, select open file location and delete the BitRaider folder. Then start the launcher.