I got this:
Hello Steve,
Thank you for contacting us. I’m sorry to hear about the trouble you are having.
I have checked the issue and it seems that the issue is arising due to some temporary glitch with the servers. I request you to kindly wait for some time and then please try to post your listings. Hopefully, the issue will be fixed in an hour or so.
We apologize for any inconveniences this issue is causing. If there is anything further I can do to assist you, please don't hesitate to ask!
Sincerely,
Auctiva Support
That was well over an hour ago!