I've had the same issue in the past. I think it may need cookies for login ;)

EDIT: You do get the issue if your session has gone too. To rule that out, change the address to the root ie chroniclesofelyria.com and hit refresh. Try logging in again. Where I used to get that error, that approach would fix it.

EDIT: Forgot. You also get that error if you visit dead links. It's a generic error so if you see something that looks like a spam post ie "the winter liquid" one that's listed, you'll get it too. I did ask a while back if they could delete the "latest post" entry when deleting pages. Hopefully they will add that in some time.