I have been unable to even queue for Cactuar because I immediately get booted out with an error 3001 that says the following:

"The World is currently full. Please wait until an opening is available an try again"

So I try to log in to a different World instead, only to be stopped by this error:

"Unable to submit World Visit request at this time"

Is Cactuar just inaccessible at all today? What's the ETA on it coming back?